It is Kurt/Blaine and it is told from the point of view of two warblers, I believe Wes and David but I'm not entirely sure. The context is that it is a retelling of Kurt and Blaine's story and Wes and David (?) make it into a book and give it to their children. It details Kurt and Blaine's relationship from before they got together and then into the future, we hear about their wedding and their kids. I remember the author wrote it so that it was from two points of view (Wes and David) and Wes' POV was italicized and David's was underlined. Later on in the fic, I think we get more points of view but I might be remembering that wrong. I believe that the way Kurt and Blaine got together was different from how they got together in canon and I'm sure that there were many times within the fic that the author branched off from canon so I'm tagging this search as AU. I do remember that Kurt was at Dalton because of bullying though. I'm sorry the description is so vague, I read it a long time ago and for some reason, I remembered it just now and had an itch to read it again.
It was on fanfiction.net, I believe.
Thanks in advance (:
(Mods- I apologize for any mistakes I make with tagging and such, I'm new to livejournal and glee finders)
EDIT: So after some serious digging I found the fiction I was looking for! It can be found here.