Love You Hate You Miss You, Paperback/Elizabeth Scott

It's been seventy-five days, and Amy still doesn't know how she can possibly exist without her best friend, Julia--especially since it's her fault that Julia's dead. When her shrink tells her it would be a good idea to start a diary, Amy starts writing letters to Julia instead. But as she writes letter after letter, she begins to realize that the past wasn't as perfect as she thought it was--and the present deserves a chance, too.