is she toxic?

this girl and i have had major issues as said in my last post but last night at 4 am she asked me to sneak two boys in one was her ex the night before the asked to sneak out of my house to go see him because he lives two houses down i told her sneak out by yourself if you want but if you get caught my parents will call yours and no i will not sneak boys in and she kept entertaining these boys so i went tf off my other friend was pissed to was she saw were i was coming from and i had already said no like 6 times well she always takes her ex boyfriend’s side so i said maybe we shouldnt be friends if that’s how it’s going to be and now she’s pissed. i also know a girl the my friend hates when through a hard breakup today so i texted her and checked on her and my friend got pissed. she calls me fake anytime i’m nice to somebody she’s fighting with i’m extremely tired of her attitude and i don’t know if i’m overreacting or not. please help