The story was excellent, in its way. Not boring at all to me. Well-written and well-told. I did not like how the ending was handled, although I can recognize that it was intentional. (Intentionality is one of my top requiremetns for art; hard to have integrity without it).
Still, while the ending did feel intentional to me, its abruptness struck me as less than skillful. It was annoying, after the slow, gradual, and detail-rich build-up/rising action of the story, to have the climax occur in about one paragraph. And to have that be the final paragraph of the story made me a bit angry.
On the other hand, the story is, in a fundamental way, about the narrator's emergence from timelessness into time. Maybe the only appropriate way for that to happen is for it to be sudden and jarring.
Whereas he was in a morass of faded memories throughout most of the story, in the final paragraph the present-moment comes into super-sharp relief. Originally, the story was meandering back and forth through years and years; but at the end an entire paragraph is devoted to events that occured in only a few seconds, the blink of an eye. For better or for worse, and in part through the sacrifice of his friend, the narrator is now officially back in 'real-time'. In other words, things are happening in the present that he actually cares about.
And yes, it's quite irritating not to know what she saw when she looked at him at the end of the story.