It helps to think of things like this:
You've figured it out. You know the game. You're better than it. All the other grunts in this world will do their homework and research their purchases and whine to their teachers because they really feel like it'll get them somewhere in life. As for you, you're a better person than that. You've figured out that homework is just something to keep you occupied. So do it, get good grades in school like everyone else, but at the very least, come out of school knowing that you beat the system. You did your work, but you also realized that it doesn't make a difference.
You'll go to college, and it'll be the same thing - you'll do homework so that you can get a good job. Do you think future employers care whether you missed some homework along the way? No, they care that you're a hard worker. So, do your work, get your grades, and move on. It's all a game, and you're above it all.
Hope I've helped. Oh, and have some fun along the way - make some friends, and play some first person shooters. You won't regret it.