I think you're still young and should just have fun, do your own thing and a guy will pop up when you least expect it. Enjoy your youth and hang out with the girls. Meet lots of ppl, i think that's the way to go.
I used to feel the same way and i was only 15, all my friends had bf's etc and i would always think well why don't i? I had like flings, etc but no serious relationships until i was like 17. Up until then i always thought omg im gonna get old and never have a serious relationship! Now im 20 and have a bf but im still having fun and not thinking of marriage. I htink nowadays ppl are getting married much older, like in their 30s. Enjoy yourself girl.