Joe, you are a good friend. And that is what your Bil needs now more than ever. I feel so bad for you because I can sense how bad you feel for him.
I overheard a man in a restaurant talking to his wife and he said to her, "What is the best thing to say, when you don't know what to say?" She said, "I don't know." and he said, "Nothing."
That has been a hard lesson for me to learn. At times, just say nothing! Be there, that is all that you can do. You probably don't have the answer, I know I haven't had it many times. Despite thinking most of my life as a JW that I had ALL the answers! What an arrogant %^@ I must have been.
You have one great thing that he needs. You love him as your Bil. That is all you can give. And Brother, that is special.
I hope the best for both of you. Your comment really touched a chord with me in my life and situation.