Simon Cowell is apparently "hardly sleeping" after sordid details of his personal life have become public.

The X Factor judge is not feeling good about the information coming from the new unauthorised biography.

A source told Britain's Daily Mirror that Simon is feeling very depressed about being exposed and is upset that he isn't getting more support from television bosses that air his talent shows.

"Simon doesn't recognise the person that has been portrayed this week," an insider told the publication. "It's simply not him."

"He is feeling very low about his. He views it as one of the worst weeks of his entire life and he is hardly sleeping."

Simon, 52, maintained that it is not his habit to "kiss and tell."

"I've never done it," he said. "I've always tried to keep my private life private, and it is so unfortunate."

"So I was feeling very embarrassed and not gentlemanly at all this week because it's just not my style."

Details of Simon's love life, his alleged bullying of contestants and extravagant lifestyle have all been exposed in Tom Bower's tome.