Andrea Hartley

I'm trying to find a movie title - it was an 80's movie about a high school couple. They find out that the boy's mother killed the girl's sister several years ago when she was driving drunk on a rainy night. She hit her on her bicycle. Each year, the girl's mom sends her a black rose on the anniversary of her death. When the girl finds out who the boy's mom is, she refuses to see him. I can't remember the ending. Any help on a title is appreciated.

I'm trying to figure out what movie this is from: "I used to be an optimist, but I'm not anymore". The main character in the movie is a young girl and is told early on that she is an optimist, and learns what this word means. A lot of messed up stuff happens in the course of the film and when asked by a teacher to write an essay under the topic, "I used to be, but I'm not anymore" she writes her essay beginning with the above quote and reads it aloud to the class. Can ANYONE help me with this? It's driving me nuts.