Everyone at school thinks I have STD's?

Okay I have a really bad reputation at school and I've done some things to earn this... But I'm a changed person now, the only person I'm having sex with now is my boyfriend and if he leaves me then I won't have sex anymore until I'm married. But everyday at school I walk the hallways and people are laughing at me and looking at me. Some people yell out things like "HIV! slut! herpes!" as they pass me. One time a new student sat by me on the bus and someone said "Don't sit by her , you'll catch something." This one guy said he loves me but he can't date me because he doesn't wanna be known as the guy sleeping with the girl with STDs. Last night my boyfriend almost broke up with me because his mom said she doesn't want him dating me because his friends told her I have herpes... His friends keep telling him to leave me. I don't know if I have anything but I don't think I do. I barely have any friends and I got three more years of misery until I'm done with High School but I don't know if I can take it. I stay up all night crying. Is there anything I can do?