I have a major crisis and need help?

Okay so I am in a little group of freinds made up of me rebecca shakira victoria and adriana and two of the girls (shakira and rebecca) are always getting in fights with me.(verbal not physical) And rebecca tells me that whenever Im absent shakira calls me a hore and a slut who doesnt deserve frends and that if my own dad didnt care about me why should she. ( my mom and dad split up so now i have a stepdad) and whenever i hang out with my other bff karen she accuses me of abandoning her again(we had a huge fight in 4th grade and seperated and then got together again be4 the whole group thing) but were really working hard 2 make things work out. so my questionn is i dont want to be friends with shakira anymore but if i say that there all gonna hate me cuz all of then just ignore the fact that shes always braggoing and acting concited and always talking about her probs like they matter more than ours, so if i do that she will turn them all against me and i will have to fit in with karen and her friends who idont know very well so wat do i do now??????