Some friendships become stronger after surviving honest disappointment.

Most friendships have never been tested, which means neither person knows what it can hold. When a real disappointment happens, someone failing to show up, someone saying the wrong thing badly, the friendship either quietly ends or comes out with more capacity than before. Repair is what creates confidence, and you cannot get it without the rupture. That is why the survivors feel different.

If a friend has let you down, consider saying so rather than filing it away. Say what happened and what you needed, without the case for the prosecution. Many friendships are lost to unspoken disappointments that would have survived being spoken.