High school boys? guys answer please. (:?

well, i'm a sopre and i'm new this year. we've only really had a few days of school so far. and there's a cute boy in my homeroom and english cl. i catch him staring at me, and he looks away. does that mean he's interested? (no, i didn't have anything on my face) i just don't know how to approach him or what to say if i do.