Hi PS,
I remember feeling like this not long ago. i do not live with my H, but have had lots of contact because of kids.
I think that even though they are out in MLC land they are aware of when we fake to much. We do have to realize that they are also a person who knows us very well.
I always tried to be upbeat and happy, but sometimes I just could not do it. Most of my interactions with my H during this time were in public places, ball games and such. When I could not fake it, I would just be quiet. Strangely, H would almost always approach and start talking. Lol! Just when I needed space.
There may be a glimmer of light for you though. When I started questioning my ability to continue to be upbeat, it was not long before the real me started coming back. I started to detach more in an effort to be able to be ME. My actions became more about how I needed to behave to keep myself from going into a depression.
I did not become nasty or mean or do anything to antagonize my H. I simply returned to being me for me. It had nothing to do with H or worring about how he would react to me.
Sorry, I know this is kind of rambing. lol!
STC