well if hes your ex boyfriend then nothing but if you guys are dating confront him and talk to him about it and then break up with him cause thats no way a boyfriend should act or be around his girlfriend
I wouldn't worry about it if it is your ex boyfriend there is not since in worrying because he isn't yours anymore. Butttt, If he is your boyfriend then you need to step up and say something to him that is pretty messed up! VERY! Id leave..
Hon, there is not much you can do since he is your ex, but you can warn your cousin and other girls about him. You can remain anonymous but still warn them about how he really is besides a con and (possibly) a cute boy.