well, my W spent most of the last two years not saying "Good Morning" or anything like that, a lot of times barely civil. Though there were periods where she would lighten up a bit.
In my case, W was friendly, chatty, etc with anyone BUT me...even our sons noticed her change when I would come into the room, or they would (she'd switch from grumpy serious to warm, caring for them). I don't know if most MLC'ers are "happy" around the LBS (if I understood you correctly), my readings lead me to think that we LBS get to see the mlc'er as they are inside (scared, mean, cold, distant) and everyone else in the world gets their "showtime" actors face of "ain't my life great now that I am done with spouse".
Lately my W has been warming up, but still doesn't like to talk at all or much in the morning (she has even said is because of her now, since I have fixed MY morning grumps)...but it has taken 2 years to get here...
Hope that helps a wee bit...please remember it is THEM, not you, it is so hard not to take it personally, but that is what we must do...
Hang in there!! T^2
In the depths of winter, I finally learned that within me there lay an invincible summer. - Albert Camus
Uncertainty is the very condition which impels people to unfold their powers.-Eric Fromm