I'm never gonna see him again :(

I still like this boy from 3rd grade. I know I never will see him again now that it's been 3 years (yeah yeah if you don't know by now I'm eleven. Deal with it.) But I still get a bubbly feeling when I think of him and the times we had. This has been happening since fourth grade. I can't believe I'm admitting this, but I fantasied a few times about kissing him. I have even had multiple dreams about seeing him again. What should I do? It's been going on for 3 years now so I'm not sure if its hormonal. I'm always thinking about him. Just typing about Trennon makes me feel warm and fuzzy inside! What is wrong with me?