I still get a little choked up after multiple readings. This poem is a beautifully crafted dark jewel of a story. Some people say it's neither science fiction nor fantasy, but I assert vehemently that it IS speculative fiction. The narrator says "If," not "Is," but that just means it's sort of like a simile, not a metaphor; anyway, it's certainly not mundane fiction. Without the speculative element, it wouldn't be anything at all. The writer uses the if-SFF structure to tell about love and grief, and if a non-fan asked me to recommend just one piece of fiction from 2013, this would be it.