I'm looking for the name of a movie,please help. I woke up about three in the morning and a movie was on about a young woman who's obsessed with befriending her young female neighbor across the street. She has pictures of the woman on the walls in her apartment. She invites the girl over to help tutor her if i remember correctly but when she gets there she strangles her. This strangulation scene last like five minutes. She then stabbs her repeatedly and hides the body in her bathtub. The girl parents search the neighborhood for her and even ask the girl if she's seen her. She goes to work as if nothing has happened,a secratary job I beleive. Her father come to check up on her and discovers that his daughter is a killer. DOES THIS SOUND REMOTELY FAMILIAR TO ANYONE OR WAS I DREAMING?