01 / USE IT WELL
A boundary does not require agreement
The other person may dislike your decision. Their disappointment does not create an obligation to negotiate access to your time, body, money or information.
02 / USE IT WELL
Shorter is often stronger
Long explanations create more material for somebody to challenge. State the decision, the practical next step and whether further discussion is welcome.
03 / USE IT WELL
Block when communication becomes unsafe
Polite closure is optional after harassment, threats or coercion. Preserve evidence, report the account and seek appropriate support.