Overview
As much as you would like, you simply cannot be friends with everyone -- so why even try? It's not that you should write certain people off or starting being rude to people who don't fawn all over you. But you should stop wasting all of your energy trying to charm someone who just doesn't seem to get where you are coming from. Instead, put your energy toward the people who deserve your time and who give you back the kindness and respect you give to them.