No matter how hard you try to make people happy, some of them will simply take you for granted. Many of these individuals will be oblivious to or fail to appreciate all you do for them. It's these kinds of people you should not keep in your life.  You don't want to associate yourself with people who only care you exist when they need something -- when it's convenient for them. They may consider themselves your friends, but they're anything but. True friends are not users, nor are they opportunists. Real friends are there for you through the thick and thin. They understand that the cornerstone of a strong friendship is giving with one hand and taking with the other. There is absolutely no place for selfishness, envy, or jealousy in a friendship or relationship. These all serve to undermine the trust and goodwill cultivated between two people. More importantly, never seek the company of people who demand that you change something about yourself. Who are they to dict...