Twilight Sparkle, slightly jealous of the fact that her friends are in happy relationships, decides to try a new method of finding love: the ponynet! Will she manage to find a marefriend online?
This story does take place after 72 Dresses, but you don't really need to read it to understand this at all.
Can also be found on DeviantArt: http://ericac78.deviantart.com/art/The-Librarian-s-Longing-For-Love-Chapter-1-268167027