Do I tell the guy I'm talking to that I'm a virgin?

The guy I am talking to is experienced and keeps bringing up sex and asking what I like etc. I'm scared that if I tell him I'm a virgin he will run away because I'm inexperienced. He said today that sex is only good if the girl is good at it. I can't really be good at something I've never done. Thoughts? We are both 19 and have been talking 4 months.