PLZ ANSWER: Sex/ STD question !?

im 15. i had sex over spring break with someone that went to my school but i didnt know him very well. wen i got back to school, EVERYONE knew. two days later, people are saying that he has an std. So i started freaking out. however, we did use a condom. Some people even said he even had herpes, but i dont think thats true. i asked him over facebook if it was true, he said "Omg No some pu$$y started that rumor I swear to god I don't." BUT everyone is totally convinced that he has one! I have absolutely NO symptoms. not to mention,because everyone knows i had sex with him and everyone thinks he has an STD, theres a hugee rumor going around that i have an std! its horrible ad by far the worst feeling ever. and its bringing my confindence down and making me feel dirty even though im not sure if i evn have One. SOOO the question is: Do you think i have an STD? and do you think these rumors will blow over?? What do i do about thes rumors?