[Peter face grows hot once more, he's trying desperately not to feel, to not admit that everyone was right and he was hurting the people he once cared about, to admit that caring was something he once was actually good at...he wanted to shut it down, forget that part of him ever existed, to kill whatever empathy he had left.

He didn't want it anymore.]

Their hurt doesn't matter because they'll die!

[He spits it out, cruelly.]

I don't care if they're hurt, they're just gonna die. They're dead already.

[He doesn't say anything about the 'cry' or 'grieve'. Those were dangerous words.]