I'm a couple of months away from turning 21, and I haven't had sex yet.
I wasn't really taught how to talk to women, and all that crap, by my parents, or really anybody. I also haven't really tried taking it that far with many women. I think I'm just happy with becoming friends with them (yes yes, friendzone or w/e). Now, I sure as hell wouldn't mind having sex with any of these girls, I just never bother with wanting to push going further with them.
I don't stress out about it. Like what others are saying, it'll probably happen eventually. I just want to get through college and find a nice job. Then I'll probably actually attempt to really try and find a girlfriend. But right now, I'm just worrying about myself.