Hi Maria, although I went through 2 periods of severe depression I think "depressed" is a very much over used modern lable, like ADH just my opinion.
I believe some people are just maybe not miserable from birth but definately have a lacking life lustre.
Others who are never happy unless miserable. It is who they are.
They don't seek help or want ad's because it is how they are wired.They fuction and go through the motions but on a different level to other people.
Some babies are definately happier than others, some children are the same. You get this huge variation in siblings from the same family so can't all be put down to bad childhood experiences.
Maybe your H is one of these people. When you are young and in love you get additional hormonal highs so they may well reveal a difference person to you.As life settles and more mundane routine life becomes the norm,these people revert back to who they really are.
I am not saying one is better than the other it is our make up, who we are.
I haven't any answers,it would be a dull sad old world if we all thought and acted the same. Wall to wall sunshine can grate on some people.
Maybe you are no longer a good fit,like your jigsaw got broken and one bit that jutted out and held the othe peices in there place got broken off, the picture is never the same again.
Thinking of you, just off for a hopi ear treatment-yikes no idea what I have let myself in for but the sun is a shining and the birds are singing and the woods are full of blossom and bluebells, what more can I ask for.