The strangeness of Time. Not in its passing, which can seem infinite, like a tunnel whose end you can't see, whose beginning you've forgotten, but in the sudden realization that something finite, has passed, and is irretrievable.
It's different when the person you love dies. There's an awful finality to death. But it is final. The end. And there's the funeral, family gatherings, grieving, all of those necessary rituals. And they help, believe me. When the object of your love just disappears, there's no way to deal with the grief and pain.
She felt intense disappointment, even a kind of guilt, as if she had missed something, perhaps forever. He had been there, she could have spoken to him. Could she call out now, cry his name? It was impossible.