Is it because I am different?

First off, being unique is an awesome and beautiful quality to possess. A lot of guys should admire that because it means you're real and true to what you like. I've learned from my experiences, that the younger a guy is, the harder he is to figure out. Sometimes they'll flirt and spit all kinds of game at you and if you flirt back and show interest, they don't know what to do with themselves. Just give them time and they'll come around. Stay focused on your schooling and your ballet and keep rockin out and before you know it, the guys won't be so awkward.