What do I do, I'm so nervous?

My friends decided I needed to slow dance with a guy, so they were asking a lot of guys that we're in the grade ahead of us. Well, they found a guy and when they asked him to dance, but of course he didn't answer. So they dragged me over to him (which I fell and they dragged me across the floor, ending with me lying on the floor looking up at him, felling so stupid). I've seen him around, knew his name, but didn't know him. Anyway, later I found out he had a girlfriend, but eventually was being forced into staying together with her. I'm pretty sure I caught him starring at me from the other side of the room. After sitting there a while feeling like a huge loser, my friends told me to get up, have fun, and start acting like myself again. So when the cha cha slide comes on, I joined in, and I swear I saw him taking pictures and videos of me dancing, smiling, but not in anyway perverted.