Going out of a my mind looking for a book I'm 90% sure was called "Confessions of a Teenage Psycho" I read when I was young. The title is misleading - its about a girl who wants to become an actress in NYC. I think its written in Diary format, it starts off with her on vacation with her family in the mountains, she somehow ends up becoming a nanny to a little rich girl in NYC. She buys a knife (which I'm pretty sure she never uses) and starts stalking Woody Allen thinking if she meets him she can get into his new movie. Its old, at LEAST pre-2000 (more likely the 70's or 80's), I don't even remember how it ends, but I remember liking it, and I can't find it anywhere...
Sixteen-year-old Laura who feels like the family misfit returns early from the family vacation in the Catskill Mountains and pursues her own adventures in New York City.Laura hates the mountain cottage where she is spending the summer, so when she gets a chance to go back to New York City she does, and accidentally gets into a Woody Allen movie.