I wanna convince my parents to let me finish school in D.C w/ my brother, rather than here in CA?

I find that CA has a lot of good colleges. :) anyway, i know how you feel. depends on your age. I think you're in college or highschool, so i'm going to say that you have responsibility to take care of yourself. My siblings moved out age 16. they handled it so well. If my siblings can do this, then you can totally move in with your brother who is in college. Who cares if you're alone when your bro is at work or school, as long as you're happy. you have to prove to them that you're responsible. Think about it. You have to take charge of the mail, bills, groceries and cooking because this way, your brother would accept you. :) right?