Happiness is diffrent for each person really,

I know for me I find happiness in simplicity and little things, I find joy in living a simple life, in spending time with my family and friends, creating something, being in nature.

What is important isn't what the definition of happiness is generally, but what the definition of your happiness is. I think this post and asking others may help you lead you to your way there.

Best wishes on your journey
Typo