UM, Help?!!!?

k, so some guys come up to me and say 'your hott' or they talk about nasty ual crap that i DO NOT wnat to hear about that they did with other girls, and they like brag.... i ma not interested in those type of guys at ALL. and like, i will be friends with them at first, but then they ask me out, or tlak about that stuff, and it makes me feel really uncomfortable and i like, i dont want to see them again, but i know that i will, and then most of the time, the ones that go to my school, just STARE at me, and it makes me feel uncomfortable. and they dotn stalk me, but it seems like they are. does ANYBODY have some advice with this? i mean, a way to feel better and not think about the sickos that come up to me, or the losers taht ask me out, that i know i will end up coming acrossing again someday....... PLEASE HELP! please and thanks, me...