Umm, seventh grade relationships usually don't last very long just because of the naivety of the persons involved, but if you really do want to pursue a relationship then you should definitely consider flirting as you don't want to ask him out of the blue. Just be friendly, and a little playful, and slightly hint that you like him. Be careful though, and make sure he likes you back before you tell him you like him, or you ask him out. Depending on the guy, he could ignore you and make your friendship awkward, or he can not like you but still be friends, or, hopefully, like you. If he does hint that he likes you back, the way you ask him out should be what you think, not what others advise you to do. Trust me, your heart will lead the way when it gets to that point; you'll probably just blurt it out because you're so nervous or something anyway.