What should I do about my worries?

I'm a 13 y.o. girl. So since November 2010, I've been struggling with the thought I might be bi or gay because of my HOCD. Then around February 2011, I met this boy I really like and had a huge crush on and dreamed about being with and kissing and it was great because my worries and fears about being gay stopped! Until he told me he didn't like me, and I gave up on him. Now that I don't have a crush on anyone, my worries have come back up and are bothering me NON-STOP! Worries like, "You don't like him anymore because you like girls" and "Ooo I bet you wanna kiss her now that you don't like any boys" And it bothers me so much! Whenever I try to find a new guy and get to know him, I never feel the way I did around old crushes. What should I do to stop the worries and annoying feelings?