What is the falling action of perks of being a wallflower?

I think that the climax is when Charlie gets home after saying good-bye to Sam because she's leaving for college. When Charlie gets home, he is flooded with memories of the night before: his make out sesh with Sam. These memories then make him slowly remember his aunt Helen and how she molested him when he was little. Charlie then proceeds to try and commit suicide because he is very sad and overwhelmed.

Someone correct me if I'm wrong, but I do believe that is the climax for Perks. ??