[He lets her pull away, not chasing after her yet.]

...

[Watanuki knows what he wants to say, but he can't be the one to say it. She has to hear the words from a human and believe them for this all to come to an end.

But for now, he can prep her for it, and at least get her to open her ears to them.]

I can't say for sure. I know why I don't blame you, but I'm not Human anymore. My reasoning may not be in line with theirs.

But I suspect if you asked them and listened, they would have an answer for you. Humans are good at talking, if you give them the space to talk.