Blue Moon by Alyson Noel

Things have changed for Ever since she met her beloved Damen, not least because she's got a whole new set of powers courtesy of her new Immortal status. But just as she's getting stronger, Damen seems to be weakening. Panicked at the thought of losing him, Ever finds a path to Summerland where she learns the secrets of his tortured past.

Not what I had expected. The first one was the best, though I want to read the next one.
G.S. (S2) *****