what should i do??....??

My honest suggestion is to talk to your boyfriend first, and tell him to let up on your friend. I mean, calling her a b.... is crossing the line. Then, tell your friend that you told him to cut it off, and ask her to join in on the truce. She should respect you enough to agree.

she seems a little jealous to me, to tell you the truth. if hes apologized and everything and she hasnt backed off, then you needa get yourself a new friend. tell her to back off and its not her business who you date, and she shouldnt concern herself with who your with.