In the chat with the magazine, where she also posed for a stunning new photoshoot, Miley said "it felt right" to wear her engagement ring.
"We have a house together and dogs. It just seems right to be wearing this ring and to be committed," she said.
"But we keep our relationship low-key and don’t talk about it any more."
She added that she has decided to stop revealing so much about her private life, believing she had been "too nice" in the past.
"We were too nice to the world and gave them too much insight – into my life and my puppies and my house – and I just don’t feel they get that privilege any more," she said.
"Like on my Twitter, I’m much more... not conservative, but you don’t see a picture of my dogs. You don’t get that personal stuff any more."
Snoop Lion made the claim that Miley was no longer with Liam during an interview with HuffPost Live last week.
The artist formerly known as Snoop Dogg collaborated with Miley on his new album, 'Reincarnated', and said of her rumoured break up: "I can't speak for her, ya know what I'm saying, but I know that she has a relationship that no longer exists."
Reports first emerged that the couple had split in March, after Liam was allegedly seen cosying up to actress January Jones at an Oscars party.
However, the rumours seemed to be shot down with new reports that they were still together, but their wedding was on hold.
We don't know about you, but our heads are beginning to hurt.
The full interview appears in the June issue of ELLE UK, on sale Wednesday 1 May 2013. Also available as a digital edition.