Need advise. I was totally used by a guy.

So I’ve been having trouble getting over my ex boyfriend and its not just like a typical boy, he really hurt me…he was dating this girl when we started talking and then he broke up with her and eventually we were seeing each other but then when he broke up with me a little after he did he went back to seeing the same girl from before then after he brok eup with her…again we started talking again and became good friends and when we hung out we went all the way and had sex, it was his second time but my first and he wasnt even my boyfriend, I totally regreted it right after we did it but then then next time we saw each other he didnt seem happy to see me and even at school he would barley say hi to me and then we totally stopped talking. I was used so badly and I didnt even like him that much to lose my virginity to and now him and that other girl are going back out again. I see him all the time at school and being in 8th grade and everyone found out about us having sex they constantly remind me about it like “hey you, everyone here is a virgin, but you” or ill say fck you and theyll say “ fck jake” , jake is my exboyfriend, and stuff liek that. I dont knwo what I can do to forget about him and get over it but im not trying to get over him im trying to get over losing my virginity to someone meaningless. I cant talk to my friend becaus they probably know less than I do and I cant talk to my mom because I obviously dont want her to knwo I had sex.