Okay, I'll admit that while I expected an open ending I didn't actually expect no ending at all; this just reads like any other chapter except it happens to be the last. Oh well.
Still, people calling this a waste of time...did you not enjoy all the chapters until now? Were you grimacing while torturing yourself with a story you didn't like, in hope that you'd be rewarded in the end? That's the only way I could see this being a waste of time, and that seems pretty masochistic. The fun along the way was still there.
If you want something similar with more plot, Starting Today We're Childhood Friends by the same author is much longer and has actual development and is still running, while maintaining the same naive cuteness that hopefully you enjoyed here.