@Locke phil,
I'm having the same problem as you, my man. I have no doubt that I will graduate from high school, but with at least a 3.0-3.5 average at best. I played football freshman year, but that's about all the sports so far. I haven't done much college prep, so I'm not even sure of my chances of getting into a good college.
My two favorite subjects are English and Music. I'm quite talented in both of those areas. My friends even ask me to bring them stories, which are a minimum of ten pages usually. So, when it seems like there isn't much to life, that's what I look back on. But you know the truth? I
really don't know what I'm gonna do after High-school. I would philosophize, but unless you're Aristotle or something, that doesn't make much money at all. Writing is a brave thing to do, for the chances of you getting published are...... Damn. Well, they're low.
So, I'm about in the same position as you man; Best advice I can give you is to just stay optimistic about your future, and work as hard as you can in the present.