She also labeled Monteith "the best person" she knew in the interview, which took place just weeks before his death in a Vancouver hotel room and will feature in the August issue of Marie Claire Mexico.
Cover girl Lea was joined by Monteith on her photoshoot for the magazine, according to E! News.
The 26-year-old actress continued by saying that in a relationship: "It is important to have someone that supports you and encourages you, someone that makes you feel that you are unstoppable, that you can do anything in the world because you have him."
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Murphy has now revealed he is planning to make a special tribute episode to honour Monteith that will serve as the third episode of the fifth series, which begins in September.
Murphy said the decision to return to work was made by Michele.
“Ultimately, we decided the best thing for everyone is to get back to work and be around people who knew him and loved him so that everyone can grieve together,” he told The Hollywood Reporter.