Show him that you love him...
embrace who he is
let him know that if he ever needs someone to talk to, he could talk to you
Show him that you are self-reliant...
that you work for the things you earn
that despite the fact that life is not fair, you realize life is not handed to people on a silver platter, so you accept that and choose independence.
Be the best person you are capable of being...
that could inspire your brother to be the best person he is capable of being
Respect yourself and respect others
and learn about your brother,
listen to what he has to say,
and offer him help