I think i stole this guy's first kiss
Do you think he's unhappy about it?
Probably, since he refused to talk to me the next day.
I get that you might like him or something but you shouldn't have just kissed him out of nowhere like that. He might have feelings for someone else and he feels like you made him betray those feelings. Try apologizing next time you see him and see what he says.
Maybe i'll just steal his second kiss.
You should never kiss someone without their consent. It would be good to apologize when you see him again. If you want to be with him, you should start slower and make sure he's interested first.