yeah, I feels that Yuzu is too conformtable inside of "best friends" relationship with Ikoma that she prefer that way rather than become lovers. maybe she also worried that the change of their relationship might makes Ikoma scared of her too. a pretty usual cases in various yuri stories.Who's betting with me that Yuzu already fell in love but was too shy to take the first step?
If it's really like this, sorry for the spoiler and if it's not, color me impressed xddd