I am frustrated. Advice on guys?

So i am frustrated. The boy i like is not open about his feelings. He'll say a real quick answer or somthing like "Leave it at that".. We hang out and they last time we watched some movies and we cuddled.. laughed and talked. Well afterwards, we were texing and talking on msn, then today at school and he just seams as if he could care less. I usually don't care about this stuff, i brush it off ina bit. But this is really tugging at me and getting to me... Help?? What should i do??