My girlfriend wants to be a cheer leader?

We are both freshman and its worse enough to have guys grabbing her *** and everything =/ and now she wants to be a cheer leader where you have to wear these really short skirts and tight shirts and it just doesn't seem right. my school is full of pervs and now she says she wont do it for me but shes making me feel like **** by saying she has been wanting to do it ever since she was little. i just don't want the perverted guys at my school to be touching her and everything :/