I am very surprised by the positive comments because there were four of us that saw this at one screening and we all walked out. We personally felt that it was painfully slow to watch and couldn't sit through the whole movie. And we really tried to stick with it. In particular, those in the group who really wanted to like it because of their personal experiences with sexual orientation alienation in the school years depicted didn't like or identify with it at all. :(
That said, it is great to see that this film really resonated with a lot of people here on the boards and with reviewers. That's the beauty of the subjective art form of film. :)