Actually, I am tired of this. There's always a tough decision to make. And it seems this is the last and the toughest. But then I read this :

beech majhdhar mein kashti per sawar
sehte hue kathor aandhiyon ka vaar
he prabhu! yeh kaisi hai pariksha ki ghadhi
moorkh! inhi paristhitiyon ka naam hai zindagi

This is what makes life interesting. Had it not been like this life would have been drudgery.
But its important to have a good attitude. You should not cry over what you did wrong. You should be able to laugh at your mistakes and say "that was a bad decision".