Ehh. I know that her being single is one of the key points of this manga, but I was hoping for them to continue dating. And come on, people like being in a relationship with a similar person, too! And their habits would probably improve if they got to the point of living together - it's easier to take care of a home when you're not living alone (especially if you're working long hours), and you can even get motivated by each other, even if it's mostly "oh, I don't want to look like a complete slob in their eyes".
Ah well. I'll continue hoping for Painful Marriage/Painful Relationship-themed chapters.