Girls help, I don't know what to do?

You should NOT be with a guy who is 17 years older than you! He is more than twice your age! And even if you said yes, he could be charged with rape. So no, he cannot have sex with you! You should not want him back, he is only in it for the sex, and not for you. Stay away from him and older men, date somebody your own age (such as 16-17)!