Boundaries are a way to take care of ourselves. It means verbalizing what impacts your comfort levels. It means learning how and when to say "no." When we set boundaries, we’re less angry and resentful because our needs are getting met and our space is respected. Boundaries make our expectations clear, so others know what to expect from us and how we want to be treated. Toxic people will do everything they can to ignore and bulldoze through the boundaries we try to set. They will blame, ignore, manipulate, guilt trip, abuse and criticize until you concede.
The Monster Under the Bed by Kim Fiske