Does he like me or is he just looking?

I often find this guy looking at me. We sit on opposite sides of the classroom, and our eyes meet all the time. it could just b a casual thing- i dont know. he doesnt seem to get nervous, just relaxed. I am also totally relaxed, and just look away. but we make eye contact so often, im weirded out and even a bit curious now ^.^ sometimes i look up to see him looking at me, but his face shows no expression. like its no big deal. i feel the same way, but is there something going on here?