What the hell happened to my crush? Since he came back he is so cold...?

Listen. Guys are weird. you can never be too careful. In my opinion if its starting to worry you. Maybe you should back off a little. you know.. take a break. If he really likes you.. he'll cool off. or.. you might want to try talking to him about it.. ask him about whats going on. :) I'm sure if it's meant to be it'll work out. Just.. try not to get on his bad side.