I know it's easy to think you're normal in high school but you're not. After high school, everything becomes an uphill battle with hurricane sized winds trying to push you down. Don't try to do it to yourself.
That 1/2 year you spend piddling away in high school could really hurt your chances at scholarships which you desperately need because we don't qualify for financial aid. You live in Airzona right? No in-state for you. There isn't a lot of money for scholarships for us and a committee isn't going to take a risk and give it to someone who dropped out of school because "they felt like it", even if it was for only 1/2 a year.
Even if DREAM passes, you still aren't going to qualify for financial aid. That 1/2 you could be spending working to save up for tuition. Life is short and 1/2 a year is a shame to squander. Use it to help you achieve your hope and dreams.