Nothing you did was wrong. She just happens to be having a problem, at a time when you are obviously functioning real well. It can be oddly annoying to have your partner seeming to be on top of the world, when you are in a bad funk.

She sounds like a deeply unhappy woman. Has she been a depressive for quite a while? It might have nothing to do with her being let down by you. She feels bad about herself for some reason. For whatever reason, she's not opening her heart to you about what is her source of pain. You sound nice enough. So what's going on? Is she just a crier? This can't be the very first time in 14 years that something like this has happened. People have patterns that get repeated. There are clues in this picture, but not in the way you tell the story, which is leaving something out. Not saying you are doing that deliberately. Details that are important to a woman often get overlooked by a man.