Cute guy in school but I can't tell him

There's a really cute guy in my school. Every day I have first period band with him, (he's about 18 or so and I'm 15) and I barely ever hear him talk. He's not one of those athletic people or anything but he's friends with one or two of them in his section. I have another class with him but haven't talked to him yet, and he graduated soon. I know he's probably straight but he's like the only person I find attractive in my school.... sad life