I don't think you need to be happy all the time. You don't have to be unhappy all the time either. Right now I am neither.
I have a lot of anxiety about the no job thing. I have been out of work a long time and I have a lot of debt because of that. But I think that is normal rational situational fear. But that is causing me to think about drinking a lot. I am not acting on it though.
If I had a job and no debt the anxiety would be gone. I don't know where I would be on the happiness scale. The winter holidays are approaching. So I would probably be all over the place on that score.
This is my second holiday season sober.