I have an issue with my iPhone App Store and Apple ID?

When I first got my iPhone I didn't have my own Apple ID because I didn't have a card to put it on. (My parents didn't want to pay for anything) So my ex-boyfriend of 2 years offered to let me use his as long as the payments weren't heavy. I now realize it was stupid to use his because we don't talk anymore.

Is there anyway I can regain control/update my app that I downloaded under his ID? (All the apps were free)

If you know his password then yes