I've been thinking a lot about the idea of "forced joy," or (much like Elder Uchtdorf's talk in fall 2017) the idea that we can be joyful in spite of circumstances.
It's something I'm really struggling with. I can pretend to be happy. It's not hard. I can spare everyone around me the struggles that I'm facing. But the more I try to pretend I'm not facing them, the more they weigh on me. The more "joyful" (read "of positive affect") I become, the more sorrowful I truly am.
When I accept that it's okay to have a hard time, that the things I'm going through really do suck, and really are hard, and really do hurt, the more I can separate them from me and find joy in spite of the hardships. But other people often don't see the joy I feel, especially since few of them are around me to see it.