Oh, I've been there, done that. I had the biggest crush ever on my English teacher back in the good ol' days

Oh my, I was head over heels, and he wasn't helping much by flirting back like he did. I was seriously disturbed!! lol
He was a real gent though, never crossed the line, never did anything wrong, and nothing ever happened. I used to think it sucked, but now I look back and think that was the best thing. It would have been totally screwed up if he had let anything happen.
Seriously, now I look back and realize I was wayyyy too vulnerable, naive, and unrealistic about it all. It was a cool feeling, and a bunch of crazy fantasies, and it's a really fun time to remember; but it could have turned into a nasty nightmare if things had gone the way I wanted them to go.
So, what I'm saying is; keep it to yourself. Try to slowly get over it, and don't do anything stupid. He may only be one year older, but it's still not right. You're in a vulnerable position, and that vulnerability can really make your head spin and mimic the feeling of being in love quite well.