True or False

So I have this friend, she has been my best friend for a while. I decied to dress up and look nice because I normally havee jeans and tee on and my hair in a ponytail. She was really rude about how come I was dressed nice. She puts me down alot, I'm about to the cracking point and about to take my high-heel and beat her in the face. which I won't since I am in school I have no idea how to tell her to back off or I'm done with her.
She makes fun of my races and cracks jokes, she may say she is kidding but it still hurts no matter if it was a joke or not. My other friends don't find it funny at all. I honestly don't know what to do about her anymore. Should I quit being friends with her or just tell her off.

Is she a True friend or a False friend

Advice Please -.o

xoxo

AliMarie