My True Desire.

How do I define happiness exactly? Because the source of happiness constantly keeps changing for me.

Hello there, I'm the Earthian.

Yesterday I was happy because I had my favourite ice-cream, today I'm happy because I get to buy something I've longed for for a long time and tomorrow I might be happy for something else. I find myself constantly associating my happiness with some desire of mine or the other.
Every single day I'm happy, I'm happy because of something that I had wanted. And every single time I'm happy because of some desire of mine, I've realized my happiness is very transient. It just doesn't last a long time because of my fault. Because everytime something I desired comes true, the appreciation from my part to it depreciates and so the outcome happines isn't longer lasting. I know all of this is my fault but I'm just trying to understand why happiness is so very linked to everything that's not going to give my eternal happiness.

I wonder if there is a way for me to be happy just in general, you know, always being bloated with postivity irrespective of my desires and them getting satisfied. Because, honestly, my only desire these days, is happiness.