You were built to conquer your environment, solve problems, and achieve goals. You'll find no real satisfaction or happiness in life without obstacles to conquer and goals to achieve.
True happiness lies in activity. It's a running river not a stagnant pond. Happiness is not in having or being, it's in doing something you love.
The secret of happiness is in having something to do. Happiness is a byproduct. You cannot pursue it by itself.