I can't read Japanese, but I did skim through the raws up until chapter 55, out of curiosity, and not really anything substantial has happened. He tried to kiss her, for the first time, during chapter 45 and got rejected; several chapters later, she panics a little, just from their hands accidentally touching. She appears to be doing some talking about Ryou in the last few chapters, and I do get the impression she's beginning to turn the corner with him, but it's still barely anything. They certainly don't seem to be a couple yet. And if volume 8 is the last one, I can't see how it wouldn't be a very abrupt ending. Assuming it stays the same length as the other volumes, there would only be one chapter left to wrap things up. And the chapters in this series are quite short, too.
Edit: In case there was any confusion due to my poor wording, I'll add that I had already done the skimming of the raws prior to my first comment. That's why I knew that if the 8th volume is the last, there may only be one more chapter coming. Even with the usual 4-5 chapters per volume, chapter 24 would be significantly shy of an 8th volume. Not to mention the volume numbers are listed in the chapter titles here. Anyway, I digress. I just wouldn't have made a comment about finding it strange that the series could be one chapter away from ending, when "nothing's happened," if I hadn't taken the full series into account, haha.