Great point.
Generally speaking, nobody that I know wakes up “happy”, just as nobody I know wakes up feeling particularly sad. It’s a myth that these people exist I think, you have to MAKE yourself happy. Just like anything else (work, relationships etc)
You’ll find everybody has “happy” days and “sad” days and other days that seem to pass us by.
As
@thebluenosebolt alluded to, if you can find a way to put on a “happy” face, almost forcing yourself to he happy, you’ll find (annoyingly) that you and others around you will have a much more positive experience.
Life, to me, in the most simple and pragmatic way of looking at it, is about trying new things to understand what things make you happy. Then finding ways to do those things more often.
Having a sense of purpose in life is important too, and often if you focus on making someone else smile or laugh, even if only for a bit, your own problems can become less difficult to manage.