Guy I’ve been talking to (21M) keeps asking me (19F) for nudes and doesn’t take no for an answer

We met at a frat party and made out for a while, he was so eager to take me up to his room, but I told him I don’t participate in hook up culture. He was a bit angry cause I kissed him only to end up ‘not finishing the job’, we settled for taking eachother’s socials before I left. He was very fun to be around, had a great sense of humor and a charming personality, I actually genuinely wanted to get to know him. But he asked me for nudes from the very first day we started texting, and it’s been going on ever since. I always brushed his request off with some sort of excuse then I got so tired of it and made how plainly uncomfortable his constant demands for something like that are making me feel and that I won’t send him nudes cause it’s not something I usually ever do and have heard enough horror stories about it. He was persistent and didn’t give up. “I can be the first and only one”, “I promise I won’t hurt you with them”, then he went to “you’re being too much of a tease”, “I need to get off”.

Sometimes he’d send me pictures of his D out of a blue or as a respond to one of my photos to show me he’s turned on, and now he’s saying that I need to pay back the favor. I never even asked for those pictures. I just need some genuine advice on how to stop him and deal with this situation

Edit;

#3 It’s done. I blocked him. When I entered our chat he triggered me by being back at it again. And that alongside everyone on here burning me about it gave me the balls to just do it. Truly, thank you all for the advice. Still not sure how to deal with him irl but I’ll share the whole thing with my friends and our mutual ones as well to see how it goes

#1 I’m on here for some advice on how to STOP him not make a relationship work with him. Do you all think I’m stupid?

#2 Also, just block him won’t do unfortunately, he’s been going after me for months, we attend the same college and have shared friends, it’d make things awkward asf