What the heck do i say to him!??

Last year, i met an awesome guy at camp, and we were kinda together but not official... he really liked me and i liked him... but he never IMed me, and when i did, he was a little rude. And then he didnt go on for a long time, like 6 months. I finally talked to him online again, and when i told him that i was going back to camp too, he was just like, "ok" like he didnt even care.. im confused... he was such a caring guy. and there r some runors going around his school that he acts gay. i know he isnt. so when i see him at camp this year, (i leave 4 camp in a week) what do i say to him?? we'll probably see eachother right when we get there bcs everyone is in a huge group.. what do i do???? what r the chances of being with him again?? (BTW, im pretty now than last year if that helps)