Justin Bieber is on the verge of a complete breakdown when he is faced with the shattering possibility that sordid details about his relationship with him will be revealed Sean “Diddy” Combs will soon be visible to the whole world, sources exclusively report In contact.

Insiders close to the 30-year-old “Stay” singer say he has “closed himself off from the world” as he wrestles with his troubling past, when he was a fresh-faced 15-year-old trying to impress a music industry mogul supposedly degenerate way of life is only now coming to light.

“Nobody knows what’s going on with Justin,” says a member of his inner circle. “Since Diddy's arrest and all the sick details that have come to light, he seems to have disappeared from the scene. People are really worried about him.”

Sources say Justin – who recently became a father for the first time with his model wife Hailey Bieber – partied hard during Diddy’s now infamous “Freak Off” orgies.

“Dealing with that and being a new dad is probably stressing him out,” the insider says.

Justin was only 13 years old in 2008 when he was hired as manager Scooter brown And usher's music label. Through Usher he met Diddy, now 54, and became the rap impresario's protégé.

As per a recently unearthed video, the two pals enjoyed a wild weekend together in 2009. In the video, the rapper alarmingly says, “Where we hang out and what we do, we can't really say, but it is like that.” It's definitely a 15-year-old's dream to give me custody of him, but for the He'll be with me in the next 48 hours and we'll go completely crazy.

There have long been rumors that Diddy plied Justin with drugs and alcohol and took him to clubs when he was underage. Justin himself has admitted that he struggled with drug use as a young adult, while dealing with pain that almost drove him to do the unthinkable.

“I think there were times when I was really, really suicidal, as if this pain would ever go away,” he once shared.

Sources say Justin, who has seen his star's significant decline in recent years, fears details of those troubled times could come to light as Diddy faces sex trafficking and assault charges in what promises to be a high-profile criminal trial.

Recent images of a gaunt Justin have sparked new fears about his mental state.

“I can only imagine the horrors he carries with him,” the insider admits. “And now he has to deal with all this stuff being dredged up and threatening his marriage and career. It wouldn’t surprise anyone if he completely collapsed!”