wavering between two extremes

I always oscillate between the two extremes of passion and blase, the disparity of which enervates me and plagues my mind.

How can I contrive to be proactive and optimistic and sanguine?
Why is happiness always a meteor while pain is always a star?
to seize the time is a hedonist point of view for us to get through thevicissitudes of daily life
in a carefree mood.
With nothing to be concerned about will be the best way to get happiness.
i can not help asking the question: Is the happpiness and unhappiness an man-made categorization of how we feel? It seems that the binary opposition is unnecessary if our mind is clear of the desire . How can we extirpate desire, without which we have no propulsion to live and think?