Keep the message proportionate
Use the shortest explanation that still tells the truth about the event, impact, and current position. For a message about how to ask someone if they want to be exclusive, use this factual base: refer to what actually happened, what you want now, and any personal information relevant to informed consent.
Give timing that can be trusted
Give a realistic date, a simple option, or a direct yes-or-no question and avoid vague promises such as soon. Make one clear invitation or boundary and leave room for a different pace or a no. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Close the loop without drama
Do not flood someone with messages, demand exclusivity, or use vulnerability to create an obligation. Meet safely, protect personal information, and stop contact when a refusal, block, threat, or deceptive identity is involved. A calm ending is more credible than a warning, a grand gesture, or language designed to provoke a response.