P.P.F Past Present Future by Jack Brezler

Ralph Gerdo was a happy boy, until February 14th, 2010, when his best friend ended up dead in the middle of a forest. Now, in twelfth grade, he's begun to move past this event and find friends in two others, Chris Foredor and Sophia Derrain. However, when he finds a clue that may point to his friend's possible survival, he now attempts to investigate the case, and either find the closure he always wished for, or a happy ending with the girl that haunted his past.