It's the end of the chapter, and we're all sad to see it go. We're also sad that it's not going to be the last time the two of them see each other. They can come back to the apartment one day, of course, but they're going to have to wait until the next day. The narrator tells us that this is the last chapter of the novel, and that the next chapter will be the beginning of a new one. He says that the novel will be set in the future, which means that we'll get to see a lot more of the characters in the novel.