Yeah... I called it. Seeing Raku with Kosaki made her realize she didn't have a place by his side.
And what an emotional goodbye... god damn. I've had some real tear-jerkers while watching the anime and reading this manga, and this definitely got me. Still not the most I've cried- I think I might have cried more for Shu and his crush on Kyoko-sensei, as well as Chitoge and her mother (shit, that one just hit me again just thinking about it) -but it was really good. Then again, I was also crying for the princess in anticipation of her heartbreak already by end of last chapter.