Nevermore by Kelly Creagh.
Release date: August 31, 2010.
Cheerleader Isobel Lanley is horrified when Varen Nethers is assigned as her partner for an English project, which is due—so unfair—on the day of the rival game. But when he makes it clear that he’d rather not have anything to do with her either, she can’t help but give this enigmatic boy with the perfect handwriting and cold, piercing eyes another look.
Soon, Isobel finds herself making excuses to be with Varen. Steadily pulled away from her friends and her football-playing boyfriend, Isobel ventures deeper and deeper into the dream world Varen has created through the pages of his notebook, a realm where the terrifying stories of Edgar Allan Poe come to life.
As her world begins to unravel around her, Isobel discovers that dreams, like words, hold more power than she ever imagined. And the most frightening realities are those of the mind. Now she must find a way to reach Varen before he is consumed by the shadows of his own nightmares.
His life depends on it.
Synopsis from 2010: A Book Odyssey.