[Killua's heart swells from the earnest kindness of the sentiment. he wonders what Blue's gone through to where he can echo the feeling. Killua doesn't challenge Blue's approach, finding his energy still skiddish, so he patiently remains in place.

he smiles, faintly.]

I'd be okay, you know. You don't have to make yourself uncomfortable because you don't want someone to be alone.

...but thanks, Blue. I'm not gonna pretend I'm not grateful.