OK will I like this boy and he likes me but what really bothers me is when he starts talking about SEX so what should I do?

You need to talk with adults you trust. If not your parents, then a trusted aunt or uncle is usually a good source.

Tell him to stop, you don't want to hear it, and if he continues, leave.

Plug your ears and say, "Get away creep". Find someone more respectful to like!

Tell him, that if he cares for you that he will respect your wishes in not talking about sex. If he can't stop himself... YOU Don't NEED HIM! Don't let one perv ruin dating for you! Move on and find someone who won't pressure you!