So my boyfriend knew from the beginning how I feel about this girl that he just became friends with .i don't like her and to find out he has her on Facebook now and she's been texting him a couple times while hanging out and we had an argument about her at least three times already and this past Monday I found out that they've been friends on Facebook and that even been to her house and been drinking with her and her brother and everything like that I don't know what am I supposed to do I don't trust him I just feel like he hurt me and he just wait don't even care how I feel what should I do...