[Billy frowns at that. That's not right, either. It's like he's clinging to a denial when things go wrong - like before, in the playground - that completely contradicts his actions the rest of the time.]

I know that's a lie. You cared about me on the last draft. You've done so much for me in my training. You're looking after Rogue. And... if you didn't care now, about all of this, you wouldn't be so upset. You're very capable.

[And he's quite certain that Loki wants to. It's just hard to accept wanting something that hurts you so much.]