She is not a friend anymore
She's been my best friend since we were 5, and we are almost 20. I think we've reached the point were we've become two totally different people. I feel like we were close when we were kids because we didn't know who we were, we were just some girls. Now I don't even remember what brought us together in the first place, and I can't go on like this. She's never been the type to give advice or anything, but now I feel like she doesn't even care. Whenever something is up with her, she would call me and I would talk to her or hang out with her just so that she could get better, but she's never done the same for me. I'm nice to her, I try to be there for her, and I am, but she's just taking it too far, and whenever she's angry or having a bad day, she bashes me and treats me like shit. She's made me cry a lot of times, and I feel like I don't deserve it. She tells me I'm stupid and she gets all snobbish and acts as if she was better than me.
I really can't stand her anymore, I don't want to see her again. I don't to keep ruining memories from our childhood together. What should I do? I really want to move on.