The New Moon

In New Moon Bella is facing a different problem from being killed by a vampire: aging. Her 18th birthday makes her freak out because then she's officially older than her beloved, always beautiful and 17-year-old Edward (even though in real years he's about 100 years old). Her birthday party becomes a chaos after she gets a bleeding cut in her hand at Cullens' house - a house full of vampires.

This leads to events that cause the whole Cullen family to move away from Forks, and Edward leaves Bella behind. Her world comes tumbling down and she spends months in a deep depression. Finally she starts to recover with the help of Jacob Black who eventually becomes her best friend, but who also has a dark secret to bear.