The Pact: A Love Story - Jodi Picoult
This is my all-time favourite book.

I read this book years ago, and I couldn't put it down. I wanted more, more, more!

"The Pact" is a suicide pact between seventeen year old Emily Gold and seventeen year old Chris Harte. The pair had been best friends their entire lives and later end up as lovers. Picoult takes us through the “now” and “then” to help us understand the story and the characters.