Did I make the the right decision to cut them off?

I know what you're going through most of us had this happen. Don't give those girls a chance to be friends. Those are not friends at all. You could report this abuse to the teacher or counselor. And would get suspended for an abusive act. You're smart, and a beautiful person, You are a stronger than you think you are. Those girls are probably jealous of something you can do and is being who you are a smart girl. Stay away from people like that. Don't let them hurt you. God is with you. I will ask god too to protect and guide you. Please don't hurt you're self. I know there are cruel people that wont get away with it for long. Let you're teachers know what those cruel girls are doing so they can stop.