A bunch of people read the last text message they ever got from an ex, and they are definitely better off.
Even more important than what you say in a relationship is what you text. When a relationship ends, it's the text messages (and the emails and the accidental pregnancies) that you're left with forever.
Eva and Mel of YouTube fame created this video of people reading the last text message they got from an ex (with "ex," defined as anyone they had any kind of relationship with). Remember: if you don't want your texts to be featured in a video like this someday, it's best to say hurtful things you can never take back in person.