Of course you did not. But you do have control over how you act on your feelings. So you have to decide if it is worth the potential awkwardness in your friendship if he does not feel the same way you do. And that is something only you can decide. That being said, I do have some concern over the age difference. I do not know if his intentions are sincere and honest, or if he is in some way manipulative.
If you two did move forward into a romantic relationship, how would that work? Legally you are underage, so there could be no physical relationship, as your parents could cause legal trouble for him if they chose, and there are many things you could not share together, like going to bars, having the same life experiences to draw from, etc. That is not to be all doom and gloom; if this guy is sincere things could work out. But do not underestimate how difficult things could be if your parents do not approve, or how important it is that your parents can accept your partner.
I am skeptical, and think you should really think about this before you make a decision.
chickita