Well, I feel wrung out now ... I'm exhausted! What an amazing story.
It's so chock full of intellectual thoughts and complicated magic that any comment I make won't do it justice. I prefer lighter, less angsty stories, and this really is an intense reading experience. But compulsive! I had to read all the way through - I couldn't give up, hoping things would come out all right at the end. Which they did, I think. I'd like to believe so anyway.
The hate sex was so gritty and realistic that it almost burnt the monitor. The description of the roses was beautiful. I loved young Severus, who showed all the makings of the man he was to become. I felt vertigo every time Harry climbed the stairs to Severus's room. Your story telling is profoundly effective.
Harry seems to be at peace with himself now, after being so consumed with hatred, and overwhelmed by the invading ghosts, at the beginning of the story. There is hope that he will meet up with Severus at some stage in the future. I'd like to think they both deserve a happy ending together after going through all that trauma in their lives.