At the age of 13 you are either starting high school or will soon be starting. All you need to do is find boys in school that you like and talk to them. You will figure out which ones also like you and if they do not ask you out, ask them out. You might think all of your freinds have boy friend experience, but the truth is most people have not even kissed a boy at 13. Do not rush into things.
One basic rule to be in relationship regardless of your age is to be who you are. When the person you like gives you few sign, go and take chances. Remember there can be danger in risk taking but that is better than to regret something. If you don’t risk, you risk even more.
Regardless of your age, it is important to find a boyfriend you like and who treats you well. Nobody should feel pressured to have a boyfriend simply because they are worried about the opinions of their friends.