Never assume that every critic is a hater. Not everyone is hating on you. Some people are telling you the truth. They may not be very gracious about it, but be brave enough to look for truth buried in acrimony.
The saddest part in life is saying Goodbye to someone you wish to spend your lifetime with. The saddest part in a life would be to spend a lifetime with someone who didn't really want to spend theirs with yours.