It took me about 2 and a half hours to finish this story. The only advice I have for you, is to edit your chapters for your future readers. It was hard to read at times because of the spelling and grammatical errors. I can't describe this feeling I have. I've read about these characters growing from teenagers to adults. You did a good job. You should be proud of yourself.
ch14- I hope you mean Draco smells like "cologne" because "colon" is an internal organ... end- AWWWWWWWWWWWWWWWWs, that's so cute!! I do feel like it ended on a sad note though. Ever since Snape died, it was like a black veil was pulled over the entire scene and the sun started peeking out, but never fully went away. The Goyle part was kinda sad too. I thought he changed from the book, you know..
Not to be rude, but it wasn't the best. Lots of errors, spelling mistakes, grammatic errors, puncuation, etc. And the story seemed to lack something. That special charm, should I say? :/ It was alright. I finished it in a few hours.
Even though this story is already finished, I just stared reading it and I absolutely love it! Since I don't know the ending, I just wanted to say that you should write a sequel! Well, only it it'll fit the ending that you have. Lovely story! :)