I didn't date anyone until I was 18 so I remember clearly the thoughts I had about it. The thing people forget is that when you've never been in a relationship every step of the process is daunting because it's all new. This can lead to the feeling that since you don't have the experience you've missed the train and now it's too late to catch it. This isn't the case at all though, and once you make a connection with a guy it'll all just come naturally, and then you'll look back and realize it was never anything to worry about.
As for being single, consider that once you meet this guy, things are going to change. There are two outcomes, either he's the guy you marry or he isn't. If he isn't, then you'll have an experience that will change you and some heartbreak. If he is, then you won't have the freedom that comes with being single ever again. I'm not talking about freedom to date or anything either, but rather where you go to school, where you work, how you spend your free time etc.. You are only 17 so you probably don't actually want to get married right now, I imagine you want to go school, or at least finish highschool, before settling down. In the secular world, the concept of dating is an ends in itself, but in the Christian world it is always a means to an ends (marriage).
After having dated a bit I'm glad to be single for this reason. My future is wide open, I can go anywhere, do anything, which also means I'm free to serve God in ways that a non-single person can't. A relationship is more than just sunshine and butterflies. With being single also comes a freedom from all of the stresses and emotional ups and downs that come with relationships. I'm sure you'll experience the nightmare that is dating someday, so just enjoy single life while it lasts.