I'm 13 and need some advice/help?

I was the most popular guy in school my whole life, until just recently. The girls loved me, i had good grades, i was handsome until this girl i dated chelsea came along. We dated 6 months and i fell in love. I know im only 13 but i dont know, it felt so wierd. She asked me the 5th month if we could have , she wasnt a slut either or so i thought. At first i was hesitant than i gave in. We did it once and we loved it, 2 weeks later again, and again and again. Until i dumped her because i didnt feel the same anymore. She got so pissed off that she told everyone at school i d her and that i forced her to do it or id stab her. Well then i go to school unknowingly and noone would talk to me, everyone was swearing at me even my best friend evan. The girls hated me and i was seriously thinking about suicide. My one true friend kirsten told me what had been said and i just didnt know what to say. For all you dudes that have an erge to have dont do it. Trust me. but now im considered "wierd" and "gay" and should be "shot" for what i "did" and i was wondering if anyone could help me. Id appreciate some help thanks :)