Because katie refused to have sex with pete for four months because she has to reserve energy for her shooting stuffs. .. Read that.. Research it. This answer will come out. :P
Why Did Peter Andre Leave Katie Price?
Cause she cheated on him with that alex reid
Peter Andre became jealous to her
It was all a publicity stunt to earn money.
He became jealous to her
Andre became jealous to her
Katie is more than a handful and how long do you think they could have gone on living they way they did. Peter couldn't handle Katie, so they eventually had to split as Katie is far too much for Peter to handle.
He didn't. She left him because apparently he wasn't being a good father to Harvey (who isn't his anyway!)