Yeah , it was shitty of her , especially since she chose to drink with guys who pressure her even when she was sober . Another thing , did she like make out with the guy back or was she just slapping him ? I think it would be hard for most people to rebuild trust after this . Do you think you would feel anxious or worried that she would do this again if she went out with friends or was with guys ? Edit I thought you should definitely break up , but I was just asking you questions so you could think about how you feel . But I creeped you and it seems this is a relationship that ' s only a few months long at max and you guys have other issues and then this on top of it all , so you should definitely break up .