Is she worth still being friends with?

i was best friends with this girl this year. but whenever we didn't hang out i would just think about the way she acts and i would get really annoyed. she's really selfish and whenever i'm upset about something she's always turns it to herself. for example if i said i was tired...she would say well im more tired! and she gets mad so much, and she's made me cry. but she was fun and it was nice having a best friend, and being in a fight with her sucks cause she tries to turn people against me. she can be nice, but she can be mean too. and i can't say anything to her, because when i do she turns on me and says everything she can think of to make me sound like a terrible person.