Let it be

Amelia Clarke is a small, simple girl who lived by her parents rules, never disobeying them. Or having any fun.
This lasted until she moved to Brighton, and upon an awkward meeting with her insanely gorgeous new neighbours, the Hearte twins,becomes best friends with them.
Oh, there's also the minor problem that she falls in love with Will Hearte, who just so happens to have a terminal illness. And about 6 months to live.