Having sex with a new guy?

So, I've been dating this guy for three months now and we haven't had sex yet, but I want too. The only thing I am scared of, is the fact that I lost my virginity over a year ago and haven't had sex since then, because the guy broke up with me the day after. I want to have sex with my new boyfriend but I'm nervous about. He told me will wait and he's not pressuring me. When I'm with him, I know I want to do it, but I get in my head too much. What should I do?