Struggling a bit to order my thoughts on this, but I'm quite worried about DH, whilst struggling to avoid feeling a bit frustrated with it all.
He's always struggled with depression. It manifests itself in him ruminating on things and getting stuck on certain negative thoughts - e.g. he hasn't been happy at work for years and we have had the same quite detailed conversation about his frustrations and the possible options multiple times a year, month and sometimes even a week. Same with his family - he fell out with a sibling earlier in the year and nothing new has happened since, but every so often we will have the same conversation about how frustrating it is.
He just seems to be completely trapped in his own thoughts and I don't think anything I do can help. We talk through what's bothering him in quite a lot of detail each time - it's not just like he wants to rant. But even if he seems ok at the end, we wind up having the same conversation again soon after.
My frustrations have bubbled up a bit today. We hosted Christmas for the first time this year and even though he was the one who suggested my parents should come and overall gets on fine with them, he has barely spoken t