What am I gonna do with my black sheep brother?

I really can't take my older brother's attitude. He's very irresponsible and indeed a black sheep in the family. He really thinks we are that wealthy where in fact, we aren't. He enrolled me at a Culinary Institute in America but won't even pay for my tuition. He has a high paying job but it seems like it won't suffice our needs. He kept on going to nightclubs and dating women from USA instead of paying attention to my studies. We only have each other. I know he can live on his own since he has a job but how about me? How am I going to survive when he is that irresponsible?