Music mogul and former "American Idol" judge Simon Cowell has revealed that he was diagnosed with depression last year.

"Did a doctor say I was depressed? Yeah. I mean I knew it myself," Cowell, 54, told the UK newspaper the Daily Mirror. "You are always looking for the next high from the show" -- referring to the recently canceled American version of his singing competition "The X Factor" -- "and then actually if you haven't got anyone to share it with per se, or if you haven't got a family around you, you can go a bit nuts."

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But now, following the birth of his and girlfriend Lauren Silverman's son Eric on Feb. 14, he said, "My life has changed, but I am probably more focused on what I am doing now than I was a year ago. Maybe because it puts things in perspective having two people in my life who I am responsible for. There were times last year when I would live in two rooms, y'know, kitchen and bedroom in your house."

Cowell also expressed regret for his affair with Silverman, which led to her divorce from Cowell's friend Andrew Silverman when she became pregnant.

"I regret that part," Cowell said. "But then of course you have a baby and you look at the baby and you kinda go, 'This is what happened from it.' "

He acknowledged that, "In this situation you are not going to come out of this well because of the circumstances," and added, "You have to deal with it and man up to it. You have to accept the responsibility and the criticism."