Why isn't the narrator surprise when patricia decides to leave school?

The narrator isn't surprised when Patricia decides to leave school because it reflects a pattern of behavior they've observed in her. Throughout the story, there are hints of Patricia's struggles and dissatisfaction, suggesting that her departure was a possibility. The narrator likely understands the pressures and challenges she faces, making her decision seem inevitable rather than shocking. This familiarity with her situation contributes to their lack of surprise.