Getting married and have problems with my fiance's bestfriend.?

OMG he's a jerk. Talk to your fiancee and tell him how you feel about his best friend. He shouldn't disrespect you like that. It doesn't matter that he is his bestfriend. He shouldn't put his hands on you or yell at you. Where was your boyfriend when this happened??? So my advice is tell your boyfriend that you don't like his friend's attitude and the way he acts when he is drunk.