I think you have a lot of responsibility for being 16. You don't have to have a job to be responsible. I think you hit the nail on the head when you said you've always felt ten years older than what you are...did you ever get a chance to be a kid? Who is supporting you emotionally right now? I agree with the whole visit to the doc thing. There can be so many things causing your exhaustion. Everyone is different and everyone has different skills and interests...just because your step-dad sleeps 4 hours doesn't mean you should have to and honestly - I read Shakespeare in high school, but have never used it since. I really wish you had someone who could support you emotionally because it doesn't sound like you're getting that right now.