Would you continue a friendship with this person?

My best friend has become best friends with girls who bullied me for absolutely no reason, fought me every time they saw me, slandered my name everywhere. All because I was dating one of the girls ex boyfriends so her and all of her friends tortured me for a couple years until she got over her ex. Well one day my friend calls me like hey I ran into (all the girls) at the mall and they’re actually pretty cool. I was like wtf. Well as time went by I found out my friend fei talking shit about me right along with them and now she thinks I’m tripping for not wanting to be friends anymore but I just think that was so fake of her when she was supposed to be my best friend!