Always - Rosaline's Story
Rosaline is heartbroken when she catches her boyfriend cheating on her. Her best friend, whom she met online and has never met in person, is Vincent. When Rosaline casts Alec out of her life, Vincent takes his place.
Note: There's a Vincent's Story too. Part way through both stories I merged it to switch between both of their sides. So if you read both, yes there are parts that are the same.