Gaslighting is when someone tries to make you doubt your own thoughts or feelings by telling you things that are not true or making you feel like you are going crazy. It is like when someone turns down the lights in a room and you start to question if you're seeing things correctly. But instead of lights, they are messing with your mind. It can be done by someone you know, such as a parent or partner, or even a stranger. It is not okay and you should always trust your feelings and seek help if someone is making you doubt yourself.