What do you do with that? It’s not earth shattering. It’s not end of the world. It’s not even really sad. It’s just…well…disappointing.
Another human let you down. They told you one thing and did another, or were hurtful or untruthful in some manner. Maybe they didn’t mean to be, or maybe it was a small slight — depending on how well your armor is working on any given day — it might be ok, or not.