Speaking openly about her partner in a new interview, Katie explained: "My experiences with other men – who couldn't see past my appearance – made me appreciate him so much.
"James restored my faith in humanity."
She emotionally added: "I sometimes look at him and feel like crying because he has no idea how much he's saved me. He's the person I prayed to meet and never thought I would."
SEE: KATIE PIPER SHARES ADORABLE PHOTO OF BABY BELLE AT BATH TIME
Revealing how she met baby Belle's father, Katie said: "In the end it was Chris Martin who sealed the deal, because we went to see Coldplay – not as boyfriend and girlfriend – and met him backstage.
"Chris asked who James was, and neither of us was sure what to say. That really made us think.
"Now, Paradise is 'our song'."
READ: KATIE PIPER OPENS UP ABOUT PARTNER JAMES ON LOOSE WOMEN
While Katie, who was left scarred in an acid attack in 2008, has cause to be overprotective of her and James' little girl, she admits that he is far worse than her.
She explained: "Something bad happened to me, but it was an isolated
incident, so why should it have a knock-on effect on my daughter?
"James is worse – he says Belle isn't allowed a boyfriend until she's 40! Mind you, she's going on a little playdate today, so he'd better get used to it!"
READ: KATIE PIPER REVEALS 'PARENTHOOD IS AN INCREDIBLE JOURNEY'
Katie Piper and James (whom she fondly describes as a "normal guy with a normal job") welcomed baby daughter Belle Elizabeth to the world in May 2014.
The emotional model declared that she had finally found her happy ever after.
Beautiful Ever After by Katie Piper (Quercus), out now in hardback, priced £16.99