"My heart's never felt the same. It was a physical feeling of having a part of me taken away.
"I'm grief-stricken that she's not with me."
But Peta said there's an important lesson to learn from such a heartbreaking experience.
"I think dialogue is the key," she said. "I think conversation is the key. I think asking your friends if they're okay, and then listening, is the key."
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Another person who feels Peta's pain is Audrey, who lost her little sister to suicide last year.
On the day that it happened, Audrey woke up to policemen banging on her bedroom window. "They sat me down and they told me that my sister had been found," she said.
After that day, Audrey developed agoraphobia, severe anxiety, depression and general anxiety disorder. She hadn't just lost her sister, but she'd lost her best friend.
Audrey explained that whenever she thinks about her sister, everything crumbles.
"Imagine one night where you've stayed up crying yourself to sleep over someone that's broken your heart - every single time that's happened all at once," she said. "And the feeling has never really gone away."
Another person affected by suicide is Brad, whose youngest brother took his life two years ago.
When Brad found out, he "felt powerless".
"It's made me realise how important it is to reach out to any loved ones. To talk about things more, express feelings and just be there for each other," he explained.
"I feel like I'm not the same person as I was and I think a lot of people expect you to bounce back to become the same person. But I'm never gonna be him again. My whole experience of life has changed."
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James has also recently been affected by suicide. He lost his best mate four weeks ago.
He said that the experience has made him realise that "mental health is not a weakness".
He added: "There's nothing wrong with speaking out, there's nothing wrong with having a cry, there's nothing wrong with having a hug and it's not weak to speak."
Useful websites and helplines:
Samaritans offers a listening service which is open 24 hours a day, on 116 123 (UK and ROI - this number is FREE to call and will not appear on your phone bill.)
Mind, open Monday to Friday, 9am-6pm on 0300 123 3393
Get Connected is a free advice service for people under 25. Call 0808 808 4994 or email: help@getconnected.org.uk
HopeLine runs a confidential advice helpline if you are a young person at risk of suicide or are worried about a young person at risk of suicide. Mon-Fri 10-5pm and 7pm-10pm. Weekends 2pm-5pm on 0800 068 41 41
The Facts About Depression Symptoms
Negative Feelings (01 of15)
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Do you have persistent feelings of sadness or hopelessness that have lingered for at least two weeks and occur throughout the day, every day or nearly every day? Are these feelings interfering with school or work, or your relationships? This is a key symptom of clinical depression. We all have negative thoughts from time to time, and it’s natural to be sad when there is a serious event in our lives, like a death. The difference with clinical depression is that the feelings stick around and interfere with your ability to live your life day to day. (credit:Shuji Kobayashi via Getty Images)
Fatigue(02 of15)
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Many people with depression find it difficult to get out of bed — and we're not just talking about hitting the snooze button. For some, getting up seems nearly impossible. They may also find themselves spending unusual amounts of time in bed throughout the day, or having trouble with normal activities because of fatigue. (credit:digitalskillet via Getty Images)
Changes In Sleeping Patterns (03 of15)
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As tired as you may be, if you’re depressed you might also have trouble sleeping. Marked changes in sleeping patterns, like insomnia or increased time spent sleeping, is another symptom of clinical depression. (credit:Casarsa via Getty Images)
Changes In Appetite (04 of15)
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Some people either gain or lose weight when they have clinical depression because of their change in appetite. For some, this means an increase in appetite and possibly weight gain as a result. Others lose their appetite and struggle to eat much at all. In either case, a significant change is worth investigating. (credit:Sami Sarkis via Getty Images)
Loss Of Interest In Fun Activities (05 of15)
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We all have times when we feel a bit more introverted than usual, but when people have clinical depression, they can lose the sense of pleasure they used to get from their favourite activities or from engaging with others. This isolation can make it harder for friends and loved ones to see the other symptoms of depression a person may be exhibiting, which makes it more difficult to know when a person needs help. (credit:David Ryle via Getty Images)
Difficulty Concentrating (06 of15)
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It’s more often thought of as a symptom of ADHD, but an inability to concentrate or hold focus on one’s activities can be a sign of clinical depression. Of course, if someone with clinical depression is also having trouble sleeping, not eating well or has lost interest in regular activities, this symptom can be amplified. (credit:kieferpix via Getty Images)
Suicidal Thoughts (07 of15)
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This is the most serious symptom of depression, says Dr. Joe Taravella, a psychologist and the supervisor of Rusk’s Pediatric Psychology Service at NYU-Langone Medical Center in New York. “When you’re severely depressed, suicidal thoughts can become so prominent, you begin to make a plan for ending your life, as you feel there are no other options.” If you are experiencing suicidal thoughts, seek help or tell a trusted person in your life and ask for help — call your doctor, call 911, or go to an emergency room. And never assume that a person who talks about suicide won’t do it. If someone tells you they are feeling suicidal or discusses plans to end their life, always take it seriously and get help. (credit:AlexRaths via Getty Images)
Chronic Irritability (08 of15)
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“Many people don’t realize that low levels of chronic irritability and anger can mask an underlying depression,” Taravella says, “which can be undiagnosed and untreated for years.” A study released last year found that more than half of men and women who were experiencing a major depressive episode reported irritability as a symptom. Constant irritability is also a symptom of depression seen in teenagers and children, one that could be written off as normal growing pains or teenage behaviour. (credit:Thomas Barwick via Getty Images)
Physical Pain(09 of15)
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Yes, depression can literally hurt. There is increasing recognition of the physical symptoms of depression, which include headaches, stomach pain, and back pain. One study found half of patients with depression from around the world reported unexplained physical symptoms. But because these physical symptoms are often vague or have no logical explanation, they can be missed as as symptom of depression. (credit:JGI/Jamie Grill via Getty Images)
Lack Of Daily Hygiene (10 of15)
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For people with severe depression, basic tasks of self care can seem too overwhelming to undertake, Taravella says. As well, personal hygiene may seem unimportant if you are feeling hopeless or worthless. If someone in your life is showing a marked decrease in personal hygiene, don’t assume they are simply lazy. (credit:Canonzoom via Getty Images)
Some people who show signs of depression engage in what Taravella refers to as “externalizing behaviours,” which include substance abuse and risk-taking activities. Men are more likely to do it, he says. These behaviours can be a sign of an underlying mental-health problem, particularly if they’re out of the ordinary for the individual. (credit:Daniel Grizelj via Getty Images)
If You Think You Have Symptoms Of Depression (13 of15)
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“If you recognize symptoms of depression, take action and immediately seek professional help,” Taravella advises. There are valuable resources out there, he says, including psychotherapy and antidepressants. Many people also find some relief with meditation and exercise, often in conjunction with other treatments. It can be difficult to navigate the process of finding the right help, especially if you are having trouble just getting out of bed. Try talking to a trusted friend or family member who can help you research options and even call a therapist for you. (credit:Paul Bradbury via Getty Images)
Once You Start Your Treatment(14 of15)
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It can take time for depression treatments to start making a difference, which is frustrating when you've taken the difficult step of admitting you need help. But while you work on medication and/or therapy, there are things you can do. Be as active as you can, Taravella says, and try to see friends. “Create small goals for yourself each week but don’t put a lot of pressure on yourself,” he suggests. While it can take time for depression symptoms to begin to lift, it may be worth seeking different treatment options if you are not seeing any improvement after two months. (credit:moodboard via Getty Images)
How To Help Someone With Depression (15 of15)
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“The best way to help someone who is depressed is to be a constant source of support for them,” Taravella says. This can sometimes be difficult, however, because people with depression tend to isolate themselves despite your efforts to stay in touch and/or get involved. You may also be able to help someone by making a doctor’s appointment for them. It’s a simple task to request an appointment, but for someone who is severely depressed it can seem incredibly daunting. (credit:PeopleImages.com via Getty Images)