3. Treat her nicely
The perfect way to treat a mean girl is be kind. No matter how strange it may sound but using kindness against the girl who is bullying you may startle her or even make her shrink back. Have you ever tried to be cruel to the one who smiles at you? It will be hard for her as well. So give her a smile and she may smile back and that may be the end of the rival. Kindness is the best way to solve any kind of problems with people. Try it, it really works.