If you can't reason with her then you really just have to avoid her. I hope you have some good friends of your own that you can depend upon for comfort, support and good times. Live your life for you, and don't let her nastiness get in the way. She can say whatever she likes about you to the other kids but your friends are the only people who really matter.

Ignoring her won't work if she continues to threaten you and if she tries to hurt you. At that point, it's time to bust her. Tell a teacher, tell your parents and know that you're doing the right thing. You shouldn't have to worry about your safety at school. If she wants to act like a thug then she can go to school with other thugs. I have no patience for bullies. They're pathetic and they make life difficult for everyone. They make people hate themselves. They don't have the right and we shouldn't let them have that power!

Hang in there and know that life won't always be this tough.