There are so many things I loved about this, but rather than taking up most of the page with comments and favorite lines I will distill it to this:
1. I adore your portrayal of characters. I think it's realistic given all they have experienced and what is expected of each of them, especially Harry & Severus.
2. I absolutely adore the ending! Harry's letter to the Wizarding world was masterfully crafted and I adored the implication that Draco Malfoy and Neville Longbottom were the first two to accept Harry's vision.
I don't know who you are, but if you are someone currently not on my friends list, I have no found a fabulous new writer to watch once the reveals are done.