Selena Gomez talks Demi Lovato "we did fall apart for a while."

Selena Gomez has opened up about her friendship with Demi Lovato, admitting that at one point "we did fall apart for a while."

"She was going through things and I was so young and it was confusing," Selena told Seventeen magazine.

Demi recently admitted to being heavily addicted to cocaine and alcohol, eventually seeking treatment for substance abuse issues and an eating disorder.

Selena continued: "I processed it saying, 'OK, I don't understand what she's going through so I'm just going to do this.'"

"I don't think it was fair, and I'm so happy that I have her back in my life now."

The two have known each other since they were 7, when they appeared on Barney And Friends. As teenagers they both went on to front their own series on the Disney Channel.

"Demi's very, very strong. She's the only person that I would tell the deepest, darkest secrets to," said Selena. "The only person."

Justin Bieber's ex also gushed: "I feel like we're all given what we can handle, and clearly someone thought Demi could handle so much - and she could, and she did. And she's incredible for that."