Should i dump my friend?

My friend is annoying the crap out of me. the way she talks is so argg! and everytime i hang out with her, i end up giving my parents hell. also she calls herself a Christian, but how? she says racist things and gives her parents hell 24/7. her dad dosn't like me. I can tell. She craves for attention all the time and thinks she can get any guy compare to me. She calls everone posers and wannabes when she acts the exact same. I tought her so much things and yet she gets all the credits. She thinks she has originality. Well basically she is annoying me based on her personality. Because i don't like the way she ats should i just tell her? how though?