Is it my fault and should I just avoid him?

i know some guys like that and to me they actually do seem to come across as "girly guys" as they do not forget the past, get moody, and bring up things that are definitely over with. The best thing to do in your situation is to still be nice to him (cause it just isn't really good to be mean or ignore someone) but give him his space. only talk to him when he talks to you first. That way, if he really wants to talk to you he hopefully won't be so rude. But if he is rude or does call you a b**** again let him know that you really don't appreciate it. If he gets mad at you then just calmly say that either he can talk to you nicely, respect you, and treat you like a friend OR he doesn't talk to you at all. That way you are giving him a limited choice. If he then continues to be rude that is when you need to tell him that you aren't going to take being treated horribly anymore and that if he wants to be friends then he will have to start acting better. After all that if he still doesn't get it then he really IS NOT a true friend and it isn't a healthy friendship so you will need to get out of it. as for when he slags your friend or friends, next time just tell him that they are his friends and either he can choose to stay your friend and just leave your friends alone or he can loose you as a friend. If he continues to slag your friend then just tell him that he isn't being a good friend and that you just can't be his friend anymore if he can't treat others nicer. Then even if he continues after that just have you and all your friends ignore his rude comments. and if some are comments he made on facebook, just delete the comments. I hope this helps and that everything goes well. :)