PLEASE give me advice it’s needed and I don’t know what to do!

I honestly need somebody to talk too, since I cant. Let me explain there is this really popular guy at school and he started to Snapchat me. I obviously answered and caught feelings really fast. He asked me for an ass pic but I sent him one. I had underwear on, and it was not a great picture😂 but he screenshotted it. And I told him to delete it and he said he did. He sent me his recently deleted and showed me his photos, but I asked him if he put it in my eyes only on snap. And he didn’t know what it was I call bullshit. But I feel so used and betrayed I just want to cry. I hope one of your guys reply❤️ I honestly need help with this and give advice. Idk what topic to post this under.