Focus on enjoying your teen years. When a girl comes along who seems right for you, then go for it if that is what you want. In the meantime there are lots of things that you can do with a friend or a group of friends that includes guys and girls. There is plenty of time for serious relationships. If you don't feel it, don't fake it. Just because some couples are "serious" doesn't mean that it's time for everyone to pair off. You would be surprised how many serious couples are just going through the motions because they feel social pressure that it is the thing to do.
Being a happily married woman, I absolutely believe in love and commitment. That being said, if I could be 16 again, knowing what I do now, I would shrug my shoulders at those peers who think that you are nobody without a bf/gf and stretch my wings and just enjoy the freedom of being me doing what I want to do.
Go out and play basketball with your buds, take in a movie, go for a swim, go to your church youth group .... whatever kids do in your area for fun. You will meet lots of different people, have fun, and gain confidence in social gatherings. If you sit around lonely and moping waiting for someone to come along to make you happy that is who "the" girl is going to see when she comes along. How appealing is that? She is going to be far more attracted to the guy who takes responsibility for his own happiness. Who expects her to join him on his journey, not drag along his baggage. I think you will find that to be true at any age.