The 'pathos' (had to use that word again!) you engender in the reader in sympathy for poor Harry's isolation, for yet another instance of the idiocy of the wizarding world, is striking. It's amazing how everyone expects unusual things from him when they are necessary to free them of Voldemort, but refuse to acknowledge the possibilities of the unusual when it would distort their world view.
Off my soapbox now, your characterization was incredibly insightful, showing the insecurity and courage of both Harry and Severus as they delve into such unexplored territory. Your descriptions of Severus' trying to project himself into real life, and his reactions to Harry's attempts at trying to make his way outside of their little world are inspired! Beautifully written, mystery writer!