HELP!!

There’s this boy that I’ve had a crush on for a while and he comes up to me today and says “so remember how we said if we still had feelings for each other once school ended we would do shit?” I said yea and he said “well we’re out of school..” and he said we didn’t have to do shot if I didn’t wanna but I just needed some time to think about things so me and my friends left after a bit. Then he asks to hang out for a bit. I said yes but when we were hanging out all he did was tell me to get back with my ex. But then he told me to date him? WHAT THE ACTUAL FUCK. And the problem is I really like this guy and I know he just uses girls and shit but I really wanna get with him for a night or two.. is that a good idea? And if so how should I tell him that? PLEAAASEEE HELLP