All I can think of is that because of you, your brother got treatment earlier. After going through it with you, your parents were more likely to listen to you when you said he needed help, or more likely to notice the changes, or something like that. Don't be mad at your brother, it isn't his fault you were diagnosed first. Be proud of yourself for blazing the tough trail to getting help, so that he didn't have to suffer all the years you did. Don't let the jealousy get to you.

My older sister hates me because she had to blaze the trail. What could have made us unique partners and friends has instead turned into a competition on her part that I not get anything better, faster, or easier than she does. And the competition even included my Dad's love. She hasn't spoken to me since my father died, because of her anger, jealousy, and hatred over a one sided competition.

Instead, continue being an advocate for your brother. Make it your goal that he does have it easier. He'll thank you for it one day.