It's embarrassing, inasmuch as Sans has enough dignity left in him to ever fully get embarrassed. He didn't even mean to say that much. Could've just left it at "sorry for being weird" and have done.

"just wanted to clear the air is all. move on."

Because he actually kind of misses talking to Mettaton, and there's been like this dark cloud over both of them, this pall whenever Sans thinks about even talking to him. And it's all stupid. It's not Mettaton he's really even been upset with. It's not Mettaton at all.

It's just--he should be past it. It's been years. Time's supposed to heal all wounds or whatever, so why can't he just get over it? Is he just gonna act like a pathetic babybones every time someone gets desperate and tries to help him?

"nah, it's...it's fine." He fidgets idly with a loose thread at the end of one sleeve. "you didn't know. and that shouldn't be something you or anyone should have to worry about. i should be over it by now."

The best part is that it's damn hypocritical. Mettaton does something desperate to save him, and then a few days later, Sans turned around and did something desperate to save Frisk. It's a wonder the kid's been able to forgive him at all--and honestly, he's not entirely sure they have.

And it's--maybe it's a bit confusing. Some kind of cognitive dissonance. Because if Frisk has every right to hate him for taking their choice away, does Sans have a right to be upset for having his choice taken away? Or is that just melodramatic?

Maybe he and Frisk are just so used to having their choices taken away that it's stopped mattering. But that doesn't explain why it still stings when it happens.

"i don't...d'you think it's better for someone to..."

No, he's not going to do this. He's not going to get into this with Mettaton, or with anyone. He settles himself with a softly frustrated sound and stops fidgeting with his sleeve.

"never mind. this event's just wearin' me out."