The Sun can exclusively revealed the Mysterious Girl singer’s comments, made at the opening of the Jorja Emerson Centre in London.
Peter, 50, has previously admitted he is a “stricter” parent than Katie Price, 44, with whom he shares both Princess, 15, and son Junior, 17.
The Aussie spoke at the launch of the state-of-the-art mental health clinic, which provides life-changing services for issues including ADHD and autism.
It is inspired by youngster Jorja, now aged seven, whose father Robin joined dad of four Peter for the discussion,
Robin told how he feared he wouldn’t get to see his daughter grow up and meet her first boyfriend, before Peter replied: “The first boyfriend thing, you’re not missing out on anything.
“My daughter’s going through that, I’m stressing like you would not believe.
“So that side of it, it’s just not fun.”
The identity of Princess’ new boyfriend is not clear.
Recently, Peter was left furious when Princess sported a full face of make-up in a photo with her mum on Instagram.
Back in 2021, he also banned Princess from watching reality TV series Love Island.
Peter has previously opened up on his fear of Princess getting a boyfriend.
The caring parent said in 2021: “I’ve never had a teenage daughter before. I’m scared.
“At the moment I see the innocence in everything when she talks about boys and all sorts of things, but of course I know the times are coming where I will have to sort of not have a heart attack at the thought of her wanting a proper boyfriend or all the things that are going to happen in her teens.”
He added: “”I really believe she’s turning into a really fine young girl, and even though she follows her friends I do try and teach her as much as I can to have respect.”
He then joked how he wanted Katie’s look-a-like daughter to become a nun.