Posting about your ex to sting them? The internet keeps that receipt longer than the anger lasts.

Anger has a short season and the record has a long one. In the moment, posting feels like the only way to make the hurt visible to someone who stopped listening, and that impulse makes complete sense. What it produces outlives the feeling by years, though, read eventually by people with no idea what it was about. Later you become one of those people.

Write it if you need to write it, then put it somewhere with no audience. Send the feeling to a friend instead. In a month you will still have the friend and no receipt.