Measuring happiness is a skill that we can learn. Having a life metric for happiness allows us to see how well we are living our life.
I use a Likert scale for measuring happiness
1 – No enjoyment, no joy,
2 – Activities you enjoyed
3 – Moments of joy
4 – Many Moments of joy
5 – Epic day
Remember, happiness is an emotion that we feel and is not the opposite of sadness or any other emotion.