Los Angeles - David Letterman says he sees a psychiatrist once a week as part of his attempt to be the person he once believed he was.
The late-night talk show host gave an extraordinary interview to Oprah Winfrey in which he talked about his feuds with her and late-night rival Jay Leno.
Letterman also talked about his effort to make amends for the affairs that became public three years ago when a man tried to extort him.
The interview was done in November and aired Sunday in the US on Winfrey's OWN network.
The CBS host says his wife has forgiven him for his transgressions and his life is more joyful than ever, but he hasn't necessarily forgiven himself.
Letterman also called Leno the funniest guy he's ever known.
Take a look at a clip from his interview with Oprah.