IMPORTANT! i need ur HELLPPPPP plz answer fast!?

ignore her, or when she talks look around as if you hear something, pretending you heard something, but not sure if you did, make her think that what she says just goes in one ear and out the other, make comments like "did you hear something" or when she acts rudely, say " Excuse me, I didn't get that, can your repeat yourself" that should make her mad, but it could make things worse if she is a bully.