This just adds to the stress level that caregiver's already have with trying to balance caregiver while making all the decisions and caring for your loved one...I feel that (somehow) I'm 'responsible' for always being 'smiley' for my mother... This extra effort is tiresome after a full day of 'work'... Then, amazingly, I feel 'guilty' about even asking this question... I guess it's a part of always 'trying' to please your parent ... get their 'approval'... When can a caregiver feel they've done as much as they can without feeling guilty?
So yes I have to stay happy around her! My poor family now that's a different story!
If you notice that your behavior or attitude is bothering your mother, reassure her that it isn't her fault and that it is temporary. But you do not owe it to anyone to pretend to be happy 100% of the time.
Guilt seems to be ever-present for caregivers. If you can't totally let it go, at least push it into the background and don't let it get in the way of being yourself, bad moods and all.