Brava! Bravissima! Dedication first, as to my mind, the story itself was only half the work. The tale, spun by the Bard, keeping the POV right, and adding the little commentary to the townsfolk (and readers) adds the equivalent of several thousand more words worth of work. (Perfect last line too!)
As for the story itself-When he was going to kill James and then got Lily to promise her child-oh, god the feeling was palpable of James's fear, Lily's desperation, and Severus's total obsession. Harry ever the brave, facing the unknown so beautifully and yet, the earring how horrific, feeling at times like just another possession. Absolutely beautiful and heartbreaking that Harry made love to Severus before he left.
I loved the little details that for me also "fix" canon-James growing up after he saved Snape for one. And that Severus would grow to love Harry more than he ever really loved Lily. That's really what it's about, isn't it? ;)