I've cried my way right through it and now my head hurts, but it was well worth it. The story is beautiful and the understated writing lets it grip you by the heart right from the first line.
Harry's grief and mourning are written so well. Almost too well. Makes one wonder how many people You've lost to understand those fucking feelings so well... A mark of genius, I think.
I love the way you've made Your story canon compliant. I've read many post-DH stories and most of them are filled with general Ginny bashing. The way JKR has written Ginny in the books makes me think the redhead wouldn't be able to understand Harry. You, on the other hand, characterize Ginny as strong, not headstrong, and patient instead of boisterous. It all makes me believe that it's possible for her and Harry to not only form a family together, but also be happy in it.
They slide to the floor. Harry buries his head in his wife's shoulder and holds her as tight as he dares. She smells of sunshine and redemption, and he can't get close enough to her. She's the only thing in his life that has never moved. He can't lose her.
I think this one fragment shows perfectly their relationship and Ginny's character in this story. It's just perfect.
Also, the way You've shown Snape himself; the stark contrast to Ginny. I remember, when I've first sat down to think over his love for Lily, it came to me that it was the source of nothing but pain to him. After so many years it seemed more of an obsession than love. It was twisted. And Snape would do anything to feed it. And Harry isn't much different in his quest to gain anything of his parents. The way they both get what they want is pure twisted, broken, disturbing, and entirely Snape, though.
The last scene, where he leaves Harry to his life... I know it's considered an extremely corny proverb, but letting someone go really is a mark of true love. And it really is just like Snape to be only able to express it through a bottled memory, send after his death.