The former glamour model - who met her ex-husband on reality show 'I'm A Celebrity... Get Me Out Of Here' in 2004 - thinks exposing their lives to the public had a negative impact on their relationship.
She said: ''Because we met on a TV show our whole life was on TV, a reality show, birthdays, kids born, everything was a photoshoot and filmed.
''If it wasn't, would we have stayed together? Who knows?''
And Katie - who has children Junior, 10, and Princess, eight, with Peter, as well as 13-year-old Harvey with former partner Dwight Yorke and Jett, two, and Bunny, 12 months, with husband Kieran Hayler - ''idolised'' the 'Mysterious Girl' hitmaker and thought they would be together forever.
Speaking on 'Katie Price: In Therapy', she added: ''I thought that we could have been together for ever. I idolised him and he did me, definitely.''
Katie and Peter married in September 2005 but they separated in May 2009.
The 37-year-old beauty went on to marry Alex Reid, before settling down with Kieran, who she wed in January 2013.
Last month, 42-year-old Peter tied the knot with Emily MacDonagh, the mother of his 19-month-old daughter Amelia.
'Katie Price: In Therapy' airs on Channel 5 on August 25.
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