Stay in school. Even though you are "just" in an alternative school, you can still have some great experiences until you graduate. You'll be rubbing shoulders with others, learning socially, and learning academically. If you leave, you might lose motivation for getting the GED. If you drop out, it will be just another way that you will be different from the rest of the world.
Your experience will be what you make of it. Sometimes when I visit the library, I see kids who are from alternative high schools. I see them flirting with girls, getting phone numbers, interacting socially. It makes me kind of envious. Because, although I was valedictorian of my high school, and an honor graduate of my college and grad school, these so-called "maladjusted" individuals know more about what's worth knowing than I do.
Stay in school, try to be a good person, stay out of trouble, study hard, get a girlfriend. You'll turn out alright.