My Best-friend Became Bully

I have been friends with this girl since kindergarten. Lately she has been getting very angry at me, and taking out all of her anger from on me. It causes so much drama and stress in my life. I was talking with my teacher yesterday about everything that has been going on. She made me realize that this is emotional abuse. My “best-friend” used me as a punching bag too. I have now removed myself from the situation. It will be hard not having her as my best-friend, but it is for the best.