Afraid of Intimacy

So I’m a freshman in college I’m 18 and I’ve never really done anything before. I’ve barely kissed anyone and I’ve absolutely never had sex, but since I’ve been in school I’ve gotten hit on a lot and even talked to a few guys but every time they ask me to go out alone I ignore them or tense up because I’m afraid they’ll want to kiss me or we will end up in a relationship and they’ll want to have sex. I know I’ll probably want to wait at least 3 months into a relationship before I have sex with them. I know I should wait until I’m ready for something like that but I am ready, I’m just scared. How do I get over that?