Controlling friend, what should I do?

ok one of my best friends is really mean to me sometimes. I know its because of her problems at home and stuff but this is really making me sad.. Somedays she will call me fat and say stuff like omg you are so lazy you need to go run, and you know I could beat you so why you even trying. I mean I love her and I dont want to just drop her as my friend all together but I dont know what to do.. she also doesnt understand that I have 2 parents that actually care about me(unlike her) and like when it snowed 6 in. here she wanted me to ride with her to another state, and I said that my parents wont let me, and she was like, omg just dont tell them, your such a baby, you get on my nerves. and I swear sometimes I feel like crying when im around her all day, I just laugh it off though and tell her oh shut up. and she just laughs bout it… She use to not be such a beeoch but here latley its gotten worse, and the bad part is that she doesnt think that she is doing anything wrong… Yesterday she told me I looked horrible, and that I better be glad that ethan decided not to come to school.. I tld my mom bout it and she said that it is just because her parents arnt there for her, but I just dont know.. does anyone have any advice for me, by the way sorry this was sooo long…