What do i tell my friend? :0?

I live by this girl and we have ben hanging out like everyday for 4years, and were like bestfriends. but now shes creeping me out, shes like stalking me. like no joke!! she wants to hang out EVERYDAY, and if i say i cant hangout, she will be like why do u have plans, and i say no and she says then why cant you hangout, then starts crying, like GROW UP!! if i post my fb status on where im at, next thing u know she will show up, she wants to know who all my friends are! and she always ask who i like, but i dont tell her cuz im afraid she'll do something to tht person, i think she might be a lesbian, cuz whenever i look up at her shes always staring at my face or looking at my chest. and if im wearinf skiinny jeans she stares at my butt, and when we go swimming and when im changing in the locker room she always "accidently" walks in on me. and shes starting to get really close to my face. Im getting really tired of her! but i dont know how to tell her that i dont wanna be friends anymore, shes starting to creep me out like nojoke!! and she does wayy more stuff, but i dont feel like typing it all. so PLEASE SOMEONE HELP ME? #nohate