what should i do??

This girl was supposed to be my friend and she talks to my bf and hangs out with him more than i do, she drunk called him and said he was cute and people keep telling me that shes trying to hook up with him and my bf knows i hate when they hang out bcuz we all met each other the same night at a party we all made out and thats like me hanging out with another guy that I kissed at the party. like he gets mad if i give his friend that i knew b4 him a ride. idk should I break up with him?? i talk to him about this all the time but he still does the same shit over again