Your brother is a prodigy as I am sure you realize by now. What a wonder he is. As a young child I can understand the hurt when he married and was not longer around. Even when he discovered that music was his passion. I don’t know how old either one of your are, but for you and your brother, you should make every effort to see him and become brothers again.
As for your story, it is just plain and honest and very good. It is good to put down on paper. Reread it out loud to yourself. You may find something you need to change. If you do reconcile, please rewrite your story as all of us will cheer you on.
I, myself, would not change one word.
From Lynda on www.writing.com