They feel an unexpectedly strong rush of guilt at brushing him off like that. They shift a little more until they're physically a bit closer, though that puts them dangerously close to the edge of the chair.

"I'm...it's good you found each other. He was...he...I think he needs--needed people he knows. Other than just me. Or Gaster. People he knows and loves. And glad you're not alone here either. It's nice." Frisk's voice is fuzzy.