Seems like you two chose each other well!
My husband is usually functional, but when things go wrong he crawls up inside himself and just doesn't wanna come out. I deal with problems by facing them head-on, and he deals with them by pretending they don't exist. Obviously that creates conflict (which then doesn't help either of us. It's extremely frustrating to know there is a problem but not know what that problem is)
He's told me that he'll go to therapy. I'm hoping that a third party will be able to help him unravel why he doesn't know how he's feeling, and how to communicate his needs