One can not sustain happiness all of the time. (Excerpt from The Long Way to a Small, Angry Planet)
This book I am reading has some very good points in it. A person truly cannot hope to be happy every moment of the day. It is nearly impossible to hold that level of emotion for any length of time. It normally wanes into contentment. I was always annoyed when people would say, “Be happy!” because I knew you couldn’t sustain it. So keep that in mind when society is pushing you to always be happy. You don’t have to! It is ok to have sad times or angry times. That is normal and 100% acceptable. It is your actions when you are in any emotion that defines you, not the actual emotion.