His unforgettable words

What would you do if someone close to you passed away and you felt nothing but worthless? Savannah Derin's father passes away and her life is torn apart. She thinks it's forever, but is it really? Mysterious letters come through her mail. An anonymous guy from her school is all lovely dovey and the problem is Savannah has no idea who it is. Will he turn her life around? And will she ever find out who this guy is?
"Notice the people who are happy for your happiness, and sad for your sadness. They're the ones who deserves special places in your heart."