Girl trying to break us up

Long story short, my boyfriend has trust issues which I can deal with. But Saturday night, he asked a girl he doesn't even like who always has drama in her life if I ever cheated on him and she actually sat there and danced around the question as if I fucked around behind his back. So of course that caused a fight and then her and her girlfriend start fighting and she has the audacity to blame ME for her and her girlfriend fighting. She actually called me a terrible friend and said I walk all over people. I thought this chick was my friend. I'm kinda hurt.