I'm surprised that other reviewers found this movie boring or slow-moving. While it's true that there's relatively little "action" in Blue Car, the story moves along briskly and at no point did I feel like I was waiting for something to happen.
The strength of this movie is in its authenticity. The main character, Meg, looks and behaves like a teenage girl overwhelmed by her circumstances, generally confused by everything around her, and constantly on the verge of flinching in fear of being hit by life's next big event. The crush that she develops on her teacher, the one person who seems to be making any effort at all to support her, evolves quite naturally. We can see what it is that she needs from him and how it gets mixed up (in her mind and in his) with his own needs and wants. As a teacher, I could totally identify with the way his role as teacher and his role as friend (and eventually romantic interest) became increasingly blurred. We'd all like to think that these things are totally separate and distinct, but the truth is that we're all far more complex than that. Different feelings get mixed together and it's not always possible to see what we're doing (and how it's effecting others) with total objectivity.
The final outcome of the movie is painful but is handled beautifully. Things may not have worked out ideally, but Meg has grown from the experience and is now ready to start taking care of herself. This film respects all of its characters and no one is there to play the hero or the villain. Even Meg's negligent mother, who I wanted to throttle several times throughout the movie, is just a person overwhelmed by the circumstances that have gradually developed around her.
This is the first movie I've seen in a while that just took my breath away. I recommend it highly.