Most intelligent people are most unsure with decisions they take. They think from all the angles about the subject and see lots of possible outcomes, but cant take the best one, because they know there is no The Best answer. Every coin has two sides(if we dont take the small round side into consideration), has value, weight, it is made of metals that are made of molecules that are made of atoms that are made of...
From this post i see that You are a smart person. Life for the smart people is not easy as of the others but without You it will be lot more dumber.
So stay positive all the time!
Wish You happiness in every move You take! :)