Add Yahoo as a preferred source to see more of our stories on Google. We've all been there—caught off guard by someone we thought we could trust. Whether it’s a friend, coworker, or even a family ...

Friends at work tell me that the office back-stabber has targeted me. I have not asked for details because there is nothing I can do, anyway. My boss enables this mischief by sending me condemning ...

The co-worker who takes credit for your work. The manager who forgot to invite you to a meeting — but blames you. The office gossip who lets it slip that you came to work hungover. Sound familiar?

How do you treat someone who talks about you behind your back? She does this with everyone. Cutting her out of my life is not an option. G. Think of it in terms of output and input, where output is ...