It's a strange one Serkeen.
I imagine most of us are grateful for the blessings we do have, but like you, I can feel myself really out of sorts at times. It's hard to describe but it's not unhappiness. I just don't feel joyfully happy very often.
Like Imperfect wrote, I think happiness IS fleeting. I often catch the moment and think 'Yes, all is well in my world.' I lose that feeling quickly and little niggles and worries creep back in and then I feel a sort of permanent anxiety.
Mind you, do you know anyone who is a continual ray of happiness? Can't say I do.
Lots of things chip away at us, like financial and health worries, or family problems. We take them all to heart. I think because we all have to contend with life's up and downs, the older we get we appreciate life is mostly a flat road, with hills and valleys to navigate every now and then. Some people certainly seem to have more lows than highs.
I think I am conditioned to be on standby, to expect the worse, whilst being aware I must enjoy the moment if I can. I try to and I do count my blessings regularly. It means we plod on rather than rejoice in the ordinary, which is in fact, really good.
They reckon that even Lottery winners don't stay on a high for long. That euphoria vanishes, apparently. I'd quite like the chance to see how long I could remain happy on a few million! Money doesn't buy happiness though. Life without good health is a struggle, a life without love can be painful, and a life on a budget is one long worry.
Happiness is elusive. I think we are just too complex, we humans!
Perhaps we have too much. My son travels a lot and thinks the poorest people with very little going for them are often the most sunny individuals.
It's strange, isn't it?