Umm..why does this girl hate me?

I don't get it. This girl in one my cles just hates me. She has like this look that can make anyone jump. Maybe she hates me because she thinks Im dum becaue I say random things in cl..in my other period people were chill. She is sooo smart and mayb that's why she doest like me. Also maybe she doesn't like me because i m white and she is black but shes not getto shes actualy gorjuss n shes nice to everyone else.