Nancy, I'm really sorry to hear/see that this is happening to you.
Alcohol is taking my wife away for me and kids, and it just sucks.
No matter how you feel, your brother doesn't have the capacity to care for your feelings, or any other thing in this life.
It hurts, and getting pissed about it is y(our) natural response, but I assure you that it won't mean a thing to him.
In my situation, my wife just looks at me and tells me 'it's MY problem'. He may not have voiced it to you, but understand somewhere in your conversations with him its exactly what he's thinking.
I really wish I had more things of substance to tell you
I'm just sorry that you, and all of us, have gone or have to go through any of this.
In His love, Spinner.