SOLVED. Psychological Thriller. There's a girl whose best friend comes to live with her secretly (her parents don't know) and her next door neighbor (a popular girl) is killed. [s]

[Justin]

sounds a lot like Choker by elizebeth woods?

[Justin]

no problem, glad you found it =D

[Andria]

Choker for the link. I'll move this to solved and update our shelves. :)

I also edited this thread's title to remove the spoiler.