It’s critical to express your affection for close friends
We’re left to speculate as to how and why the girlfriend ended up as an ex. This inadvertent communication might be a factor, but there are a slew of others, such as a vacation to Florida without her. Perhaps this lengthy, self-congratulatory text message sent to the incorrect person was an attempt to ease the pain of a breakup.
At the very least, the buddy was sympathetic. There’s a good probability the buddy was in the know and thought out the best method to inform the storyteller of what was going on.