Helppppp pls 💘

So I’m 18 and I met a guy through Grindr and we did something (I gave him oral sex)... and he stopped talking to me (he’s a fuckboy) and now (1 month later) he messaged me and he wants to go all the way w me (I’m a virgin). But he told me he had already fucked another boy and I feel devastated right now because I wanted to be his first... I hate being this way. I hate the fact that I’m clingy as hell and annoying.. like after we were together for the 1st (and only) time in my head we were already married (you know?). And now he told me that he banged someone else.. even though we weren’t by any means in a relationship I feel betrayed.. What should I do? Hook up with him or tell him to fuck off. And also help me to stop being like this Thanks