Happiness (perception of success) is usually relative. We haven't evolved to a point (culturally at least) where life isn't a zero sum game. So, when exposed t

Happiness (perception of success) is usually relative. We haven't evolved to a point (culturally at least) where life isn't a zero sum game. So, when exposed to others successes, esp in areas we lack, all the time, we start to think something is wrogn with us.