Be with those who bring out the best in you, not the stress in you.
How many times have you been around those who complain just about everything and anything?
You know, people who make huge end of the world type of deals out of a small and insignificant things.
Or those who speak of their illnesses, how bad the world is, how bad the economy is, the countless bad news showing up on television, gossiping about other people, and criticizing others?
They always seem to focus on the negative side of every single little thing. Nothing is sadder than being unhappy all the time.
The reality is that you have no control over how other people should be, it is their free-will after all to be whomever and however they want to be like.