How do I ask if this boy likes me?

Today I sat down in Latin and I noticed that the back of the chair in front of me had "I <3 (my name)." This kind of startled me. Anyway, I asked my teacher who sit in my desk during second hour (the hour after mine). She named a junior boy I know and kind of have a crush on (but he is not aware of it). I figured that the boy must have written it, as my Latin clroom is used only for the first two hours of school. I am pretty sure that the boy wrote it, but one of his friends could have been fooling around, so I would like to ask him. I don't want to seem accusatory, overbearing, or make myself look like a fool if I just up and ask him. What should I do?