Help!

I’m alway so afraid to post stuff like this.. because y’all always so quick to just.. but I guess here goes.. I really like this guy. Like a lot. I even want have sex with him. He always invites me over and I want go over but I am afraid to. I’m afraid have sex cause I don’t know why. I don’t know maybe i’m not good enough or something. Any advice. I have had sex before with one person. And I have always been responsible doing it. I know I want do with him.