He winces. Just slightly. Because yeah, he knows. He's not sure if that's worse or not. If he knows, he can try and help them, stop them, like back in winter. If he doesn't know, then--well, they'd be happier. And he'd probably stop getting worried every time he doesn't hear anything from Frisk for awhile.

"i don't think less of you because of what i know. i don't hate you. i'm not mad. and if...forgetting everything would make you happy, then..."

He can't say it, though. It's not true. He puts too much value in his memory. It's all he has.

"...it should be a different sans here. a new sans. but, god, that's awful, isn't it? i've ruined everything for the next guy. he'd show up and wonder why his friend from the ruins hates him, and why his brother is more worried about him than ever, and why alphys and mettaton look at him like that. he'd have to start all over with chara. he wouldn't know a damn thing about them, or about asriel. or about you. he'd look at you and think...the human. the anomaly. the one who saved everyone, or the one who didn't. he wouldn't know anything about you. and maybe he'd do things better, but..."

He pauses and presses a hand to his forehead. He shakes his head. Everything feels swimmy, unreal.

"no, that's too cruel. i won't wish that on you or him or anyone. it's too much like a reset. i don't want to just...do that anymore. i don't want to--be him. this might be the closest we ever come to being free from all of it, and i won't just--throw it away. i'd rather...i'd rather there be a future. because if there's a future, then that means it's...it's not too late. isn't...isn't that better? isn't it better if we're allowed to move forward? i..."

He covers his mouth, but that won't keep it in.

"i don't ever want to go back."