Some people mentally take a semi-long walk off a short cliff. Ron I think took a running leap off the edge of sanity. Somehow I seriously doubt there's much hope for him ever returning from the dark place he is now. Of course, if there is, it's probably tied to Harry, which makes it unlikely the new, self-proclaimed BWL is unlikely going to be willing to accept it.
I enjoyed the rest of the chapter immensely, especially Luna's comment's about Hermione's relationship with her bookshelves.
I'm looking forward to the next chapter.