Gaslighting is unfortunately a very common phenomenon, and one that is very cruel. If you are not familiar with it, it is essentially a form of psychological manipulation, in which a person gradually makes another question their own memory, perception, or judgment. It is a particularly terrible thing to do to someone, especially if you're supposed to be in a trusting relationship with them.
Take a look through the gallery to find out the signs of being gaslighted, and how to deal with it.