So this man thinks he can do better, and actually tells you so, but still feels entitled to casual sex, and now he's guilt tripping you.....what an ego lol.

Some people here think he's got a crush and the way he expresses it is via negging. But to me this person sounds very confident (i mean he explicitly asked for sex), if he had deeper feelings for you I think he's more than capable of asking you if you want to date him. Instead, he's ruled that out.

I think the likeliest scenario is he did think the negging had worked, he could use you for sex and he got a shock when you refused. It shouldn't be your job to make him feel better about this. Him even having hurt feelings over this shows massive entitlement.

I personally would distance myself and try to work on meeting other boys/making new friends.