Check who should receive the message
Confirm that you have the right person, the right role, and permission to disclose the information involved. For a message about how to apologize for flirting with a friend's partner, use this factual base: identify the moment, the impact on trust or inclusion, and what your friend should not have had to carry.
Separate information from interpretation
Label confirmed facts, open questions, and the specific decision that belongs to the recipient. Offer a repair that matches the harm and show how your behavior will be different. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Use formal help when stakes rise
Do not use shared history, mutual friends, or public gestures to pressure a private response. If contact is unwelcome, stop and avoid using mutual friends as messengers. Medical, legal, financial, employment, and safety decisions may require a qualified professional rather than personal persuasion.