I just finally made it through all fifty-something chapters. It was pretty good. There were like 5 (I think, wasn't counting) points that would have made good endings, but where you did end it was a pretty good place to end and for the sequel to pick up from.
Holy, I cant believe this is just a fan fiction. The way its written it's much more than a fan fic, its more than a story. Do you have something you want to tell me? Aha, kidding. But honestly? You ... have to find a way to keep this story going. I cant bear to read the ending yet D: