Your coach is right, you can't fix him and that sounds like a pretty important issue in his life.

I know you've read this at least 100 times but focus on what you can change-You.

And just be open to life, you never know what might happen.

Me 57/H 58
M36 S 2.5yrs R 12/13

Let me give up the need to know why things happen as they do.
I will never know and constant wondering is constant suffering.
Caroline Myss