Everybody Hurts by Joanna Nadin and Anthony McGowan
Everybody Hurts is your classic opposite side of the tracks story, with a bunch of twists. She goes to private school, he public, but they meet in the hospital cafetaria by chance and hit it off. With a few hurdles, they start dating. Then a real relationship grows. She's ill, but it's not the focus of the book, it's just a part of her character. She has a tumour on her brain, but its not cancer, just pushing on her brain. It still tugs on your heartstrings though.
There's a lot of misunderstandings and a whole lack of communication between them, that you as the reader are aware of since you're reading both sides. They just are't very good at speaking about how they feel, and both playing a little hard to get.
It's an awesome teen read, and although it gets a little deep, its not sappy with such a quick plot. The story is a bit of a whirlwind to be fair.
I'd recommend this to any lover of Joh Green, Rainbow Rowell or Holly Black.
Thanks to Hachette for my copy of Everybody Hurts