Eh, sex is only a big deal if you're not getting any.

I didn't lose mine till i was 22. And my current girlfriend was a virgin (not anymore though!) when we met. She was almost 22.

Don't worry about any lack of experience. If you take one thing away from this thread, it should be that sexual experience is a lot less important to girls than you probably think it is. If anything will turn off girls, it'll probably be your insecurity about it. Try and turn it around and don't be embarrassed that you've never had sex. Instead, tell girls you have really high standards, and so far nobody's met them. If nothing else, she'll think you're funny.