It can be painful when we learn that someone we trust, admire, and respect -- whether an old friend, family member, or colleague -- is talking behind our back. We feel betrayed, cheated, violated. And to add insult to injury, they try to act all nice when they're around us, as if they genuinely cared. If that doesn't sound like the quintessential fake person, I don't know what does. People talk behind others' backs for three primary reasons: 1. They envy something you have that they perceive as lacking in their own lives, whether your looks, social status, relationships, possessions, or title.  2. They aim to make themselves feel better by spreading falsehoods about you.  3. They know they can't emulate your lifestyle, so they figure talking smack about you -- especially around people who hold you in high esteem -- is the only way to hit where it hurts.  Our immediate impulse may be to go and rip them a new one. But see, that's exactly the reaction...