Neither of you can quickly, or easily "fix" whatever your S is going through. If this were that easy you wouldn't have your own issues to work through. You could just fix it all.
The only thing you can say to H is.... Yes, S is struggling, but you are going to do your best to try and help him work through it all. And you'll give him lots of attention and support and seek T.
There is no arriving, ever. It is all a continual becoming.