Gaslighting.

This is a form of psychological violence, when one person tries to convince another that he is inadequate, overly sensitive, sees the world distorted. Typical phrases in the gaslighter's arsenal: "You exaggerate" “You just thought! You got it all wrong!” "Don't be so nervous! Don't say a word to you!" “No, I would never say that, why are you making this up?” Sometimes all this is said on purpose to destabilize the victim, deprive him of confidence in his own adequacy and make him more submissive. This is what narcissists, psychopaths, and just plain manipulators usually do.