[Alea Misa]

If Zero wasn't so Emo, Yuuki wouldn't even give him the time a day. Its pity not love.

I disagree, Yuki knows that Zero is completely capable of taking care of himself. He is the one who is protecting her alot of the time.

Spoiler for continuing...:

Also, Yuki wouldn't be so concerned about how he felt about her, and how acting and saying what she did to him before Zero bit her on the neck. And she wouldn't be emotional nor try to be so involved with Zero. I dunno about familial love, I think she does see him as family, yet also its more than that. She isn't even afraid of Zero when she found out that he is a vamprire, and Zero bit her. Yuki did say she wanted to get close to him, and mentioned that she can't seem to reach his heart, and he is like a fortress. Which makes me wonder about that, because one he does work with her, two, he protects her which signifies he cares about her. If she saw him like a brother, that would be sufficient enough.
Then, with her attitude with Kaname-Senpai is different because she does admire him as he's saved her when she was little, yet at the same time she fears him as she's seen what he is capable of. Its just very different her interaction with Zero and Kaname.