Umm, well there is many good looking girls out there that many guys find themselves attracted to. You just gotta say no to those guys. There isn't anything you can do about your looks unless you want make yourself look ugly.
Also if the guys are aggresive press charges. As a girl who is I like to think pretty good looking, just be poliet and so no unless they get rude, touchy, ect. That is when you become aggressive and tell someone to freak off.