How to get over someone you never dated?

Im sad :( I miss this dude and want to fw him. We haven’t talked in 3 days & I miss him, I think he’s probably talking to someone else (idk fs) but I know he’s talking to someone his snapscore keeps going up. I know I shouldn’t care but I do because I miss him. I still wanna fw him & hope he messages me. How do I get over him☹️. I should’ve continued to ignore him & shouldn’t have met up with him. He probably just wanted sex & is now no longer interested in me. Eh my fault for having sex with him :( should’ve thought about things beforehand. I lowkey don’t want to date/fw anyone because I don’t know if I wanna get attached because when they leave I’ll be really sad. I’ve cried a few times because I was stupid & shouldn’t have had sex with him (eh kinda regret it but it was also great so kinda don’t ) & because I miss him😪. (Not here for some of yall to tell me “that’s why you don’t fw someone beforehand”) I know this🙄 I didn’t think about if I wanted a relationship with him beforehand & even afterwards until after we hungout for the 2nd and 3rd time. I was also horny lmao & kinda wanted to have sex so I did🤷🏻‍♀️.

We had sex 3 times, my stupid ass shouldn’t have ever had sex with him if I wanted something serious (I didn’t know what I wanted at first that’s why I did it plus I also wanted to fuck but yeah I know smh lmao stupid of me to do so & won’t be doing that next time). And eh I gues yeah I kinda got used but I also wanted sex then thought hard about it & realized I was leaning more towards a relationship rather than a fwb. We last hungout Jan. 2nd :(