Katsuki Bakugou

So this is a hockey au because why not if you got a problem with that idk what to tell you lol Anyways you were dating one of the top hockey players in your school but ofc he cheated on you with your roommate so katsuki bakugou the top hockey player on the rival team (UA is the school btw you go to a different school) finds out somehow and he seeks you out offering to play as your fake boyfriend to get back at your ex but the more you two hang out the more it feels real till dates are not to make your ex jealous but to actually hang out and games where you scream his name when he scores. But now your ex wants you back what should you do?