My W left a couple of months ago as i was quiet and withdrawn and we wd not speak for weeks at a time. We'd been married less than a year. She felt shut out and lonely because i wdnt open up.
I imagine you maybe felt the same when trying to help your H. From my experience the more my W tried to help or understand me, the more I felt a failure and wd withdraw more. The silences wd escalate more.
I've been to conselling by myslef, read NLP books and Dr Phil, Michele books etc and have realised how I need to change - unfortunately not brought my wife back yet
I did read a good book called Why Men Walk and Women Talk that might give u a better handle on things.
Anyway - hope all goes well and don't give up hope