If Matsuri Hino could do at least one useful thing, it would be for Zero to at least be aware that his feelings for Yuki are mutual. I mean, given the circumstances, odds are Yume is a possible "no-go", and Zero even questioned to himself why he still had hope. And that concludes how Kaname betrayed Yuki and decided to abandon her, whereas Kaname told Zero in the 1st arc, "You will not betray her".
Of course not! Zero's zodiac sign is the dog, and the virtue that very well perceives the dog is loyalty. Yuki and Zero's "unbreakable bond" is a way of denoting how much they care for one another. And there have to be some signs in the 2nd arc that prove Zero still loves Yuki.
Zero accepted Yuki's proposition in chapter 80 to "temporarily" protect Sara.
So we can only imagine just what the heck is going on inside Zero's head. Oh and I don't know if this means anything, but does anyone else think that Zero looks a little worried on the last page of chapter 81?