Tom Fletcher felt "pressure" as a new dad.
The McFly frontman's wife Giovanna - with whom he has Buzz, six, Buddy, four, and Max, 20 months - admitted soon after Buzz's birth, Tom "started second-guessing everything he felt".
She said: "He suffers from really bad anxiety, and when our eldest, Buzz, was born, Tom started second-guessing everything he felt. He was desperate to be a dad and he knew he loved Buzz, but there's so much pressure to feel a certain way, it's scary when that doesn't happen. When Buzz was about a year old and had started to smile and play, there was a massive shift; it was as if the pressure had lifted."
And Tom admits he has "learned a lot" about himself since becoming a father as he is "incredibly sensitive and emotional".
He added: "I've learnt a lot about myself through our son Buzz because he's exactly like me: incredibly sensitive and emotional. I cry at every book and film. I'm not your typical alpha-male pop star. Most teenage girls are looking for someone a bit tougher."
Tom battled depression before he became a dad.
He shared to The Sunday Times magazine: "Gi and I understand exactly what mood the other is in without having to say it - that's come from years of having arguments and getting things wrong. She knows me like no one else, and she's put up with a lot.
"Pre-children I'd sometimes be so depressed I didn't want to leave the house, or so manic, writing a screenplay, a book and an album at the same time. When you're bipolar, you lose sense of reality. It sounds harsh, but you need someone to be a bit dismissive and say, 'Great, but what are we having for dinner?' One of the best things Gi does is not give a shit about my crazy ideas."