I'm a bit sad that the story is over, but it's a beautiful ending, that feels like a beginning for them. Probably that's what "Shanshu" should mean.

“Some people can’t stand being alone.” <...> “She thinks she can handle anything, and she can handle a lot, but isolation, no one’s strong enough to handle that load.”
Truer words were never spoken. And the next part with the lecture at the party is also a perfect Willow )