I know, it's really hard!
We love them and we want them to feel better and that can make us look for a quick fix--so they'll feel better now. But this didn't happen overnight and it won't go away overnight, as the old saying goes. But the sooner he can share what's on his mind and what his inner experiences are, the sooner he will start to feel better, I suspect. And he will get to know himself and the world around him better so he can feel comfortable now and in the future, wherever life takes him .. or rather whatever direction he decides to steer his life.