Harry, who admitted he “shut down all his emotions” for two decades before seeking help, said fun and humour are helping him to move on
Harry, 32, said the key to a happy life is to “grow up but also to stay in touch with your childhood side”.
He expressed his desire to become a father but also to “kick the ass” of his godchildren on PlayStation.
In a remarkable chat with mental health writer Bryony Gordon, the prince said he is godfather to five or six of his mates’ children.
When asked: “Are you a really awesome godfather?”, Harry replied: “I’d like to think so.”
He referred to popular shoot ’em up video games when talking about keeping his childhood side.
He said: “If that means going to someone’s house and playing PlayStation, kicking the ass of their son on Counter-Strike, or Halo, or whatever it is, then I will try and do that.
“I’m actually out of practice on that, but . . . of course, I would love to have kids.”
Harry also stressed: “I’m a massive believer in humour, simply because I spent ten years in the Army.
“But if you sit down and talk to these guys about the issues they’ve had, it’s all dark humour.”
He joked he would be “crucified” if he used such humour in public.
Harry was only 12 when Princess Diana died in a car crash in Paris in 1997.
He tried to suppress his heartache but finally faced up to it at 28 — after brother Prince William begged him to seek help, The Daily Telegraph reported.
Harry admitted that he sought counselling, a revelation being viewed as a major prompt for those suffering from mental health to speak out.
And he touched on “Queen of Hearts” Diana’s influence on his work.
He said: “One of the best things ever, I suppose this is what my mother believed in, if you’re in a position of privilege or responsibility and can put your name to something you genuinely believe in . . . then you can smash any stigma you want and encourage anyone to do anything.”
Princess Diana with Prince Harry outside King Juan Carlos of Spain’s holiday villa in Majorca, August 1987
Reflecting on his own turmoil he said: “I know there’s huge merit in talking about your issues.
“Keeping it quiet will only ever make it worse, not just for you but everyone else around you, because you become a problem.
“And I, through a lot of my 20s, was a problem, and I didn’t know how to deal with it.
“Once you start talking about it to your mates, two months later those mates were coming back to me and starting to slowly unravel their own issues, because they knew that I could relate to it.”
He added: “What we’re trying to do is normalise the conversation, to the point where anyone can sit down and have a coffee and just say, ‘You know what, I’ve had a really s*** day, can I just tell you about it?’
“Then you walk away and it’s done, rather than a week later, or 20 years later, what could have been something small can grow into this beast of a snowball that you can’t dislodge.”