[Kate*]

If you're dead set on this and no one is going to change your mind, then develop a plan for how you're going to make a living (without a diploma or GED, it might be harder than you think), and then pursue it. I think dropping out isn't the best idea, but I also have to agree that it doesn't prepare you for life. Find out what you need to do what you want to do and focus on getting that. You may also need your parent's permission to drop out before you're 18.

Also, if you're dealing with a general lack of motivation, not just with school, it could be something more serious like depression and you might want to consider talking to a doctor or mental health professional. You don't have to make any major decisions right now. Use the next 2 years to really think seriously about what you want and whether you can drop out of school and still do all of those things.