Aud, I can relate to your H. I process my feelings privately. My W has observed this in me. I write daily, and notice if I don't I get irritable.
I seem to communicate better in writing than in-person. IC is still a struggle, even after all these years, but I keep going, because it's helpful in a way that private self-expression is not. I would recommend it for your H.
With your husband, is it a gender issue, an intimacy issue, an introversion issue? Is it something he needs to work on? Is it enough for the feelings to be known internally and expressed privately versus expressed via verbal commuinication? Can a private person be as happy as someone who expresses themselves verbally to others?
As you say, it's beyond the scope of your influence, unless he asks for help, and as long as you're a safe person to be verbally intimate with.
CL
CL 53 W 54 M 20 yrs. 03'-09' Separation + Old Patterns + GAL 10-14' Piecing
"The Master allows things to happen. She shapes events as they come."