You may be sick of hearing this, but it's true: you're only 16 and you have your entire life ahead of you! Don't worry about not being able to find a boyfriend now. High school is one of the worst environments to make friends in, since you are forced together under no particular common interests other than than the completion of your education. It's a terrible place to meet friends or significant others in most cases. A lot of high schoolers are in a rush to find a boyfriend or girlfriend, but there really is no hurry. Becoming desperate will only lead you into a rushed relationship that will probably be regrettable, short-lived, or both.
If you're planning on attending college, then it is way easier to meet people there. University students are there because they want to be there, and you're able to do things specific to your own interests with other people who are interested in the same things as you. However, you want a boyfriend now, so the best thing to do, in my opinion, is to emulate that by joining clubs at school or doing activities that interest you outside of school.
Even if you can't find a boyfriend now, that's perfectly fine! Don't stress yourself worrying about it. Just do what you love to do, and you will eventually find someone naturally, even if it takes a while.