[Oh, Mettaton wished he could move. He really did. But his legs feel leaden, too thinly linked to his innate magic and the tether of his SOUL to be of any use right now.

It means he can't run anymore. It means...the inevitability is that he will have to come clean with Asriel, because they're friends. And friends tell each other these things.]

Sweetie, I know. Oh, I know you would have helped me if you could, but look at what happened when I wasn't there. You had such a hard time, and with the way I've been, I could not have helped you through it any easier.

...I would have made it much worse, Asriel. My mind is in a very dangerous, very unsafe place right now.