Pete Wentz opened up about his drug use and how his marriage to Ashlee Simpson ended because of it.

The singer spoke to Rolling Stone about how turbulent his life became after Fall Out Boy went on hiatus in 2009. He curbed his drug use because of the birth of his son, Bronx, in 2008. However, shortly after Bronx was born, Wentz began to abuse the prescription pills Xanax and Klonopin, drugs used to treat anxiety.

"I was probably physically and mentally addicted," Wentz revealed. "It started from insomnia and anxiety from flying, then it spiraled."

Wentz' drug abuse continued even after the rocker returned to his life as an entertainer. His marriage to Simpson was already experiencing difficulty at this time and Simpson filed for divorce in February 2011. The breakup of his marriage made him feel like even more of a loser.

"I'd basically gone from being the guy in Fall Out Boy to being the guy, who, like, hangs out all day. I didn't see how I'd ever come out on the other side," he said.

The divorce left psychological scars on Wentz and led to bouts of paranoia. He believed his home was being bugged and had his place searched for listening devices. Ultimately, he was able to turn his life around with therapy. His love for his son was also a motivating factor.

"You're up in the morning, and you have to really be there," he said. "It's not like getting up for a radio interview. In some ways, that was super helpful for my soul."

Wentz and his band will begin their Save Rock and Roll tour on May 14 at The Rave in Milwaukee, Wis. His personal life also experienced a rebound - he started dating Meagan Camper in the fall of 2011.

He and Simpson are on good terms, as they share custody of Bronx and are able to put their son first. He praised her as a mother in April.

"I feel like we both realize that we're parents and we're in it for our kid," he said during an appearance on Bravo's Watch What Happens Live. "That's made it really easy."

Tags: Pete Wentz Ashlee Simpson Fall Out Boy