Is she her friend or not, please help? i'm confused.?

alright well my best friends, or perhaps so-called best friends, were talking about this a girl a week before today, right? they were like " omg, look at that trashy girl, she's so dirty. evie, ok , don't be her friend. she's disgusting && has lice. " i just said " OK... " and didn't follow their advice.. my bffs are kinda popular so yeah. they always talk about some1. typical stereotype. anyways today, they begin talking to her and hugging her and doing air kisses and laughing with her, and i'm like, what the hell?! a week ago didn't you just say " she's trashy! " and now your kissing her butt? what the heck is that? and then when we were playing basketball me and my other friend were saying " look, that girl traveled! " in a non-offensive way and she comes up and says ( the girl who was being talked about. ) " why are you talking about me wow. you have no life. " and i told her all i did was say you traveled, and your getting angry. then she pushed me back, and i fell so i slapped her ( because my instincts told me to. ) and we got into this biggggg fight. then my so-called bff come up hug her and take her to the bathroom and they were laughing about something. i didn't hear that part but in the fight i kicked her in the face and her face was swollen. and then my old-bff was hugging her and she's like " oh, it's okay sweetie. " acting like she was her mother. i'm confused. is my so-called bff her friend or not, or is she mine? she didn't even talk to me after that happened. then for the rest of the day i had anger management LOL and came out punching anything i saw. not my mom or dad though, that'd just be messed up.