[Oof. It's not an unfamiliar sentiment, sure; Armin knows well enough the temporary nature of people that he loves. Still, in a context such as this - someone choosing to leave instead of being taken--

[Well. He knows that pain pretty well too.]

I did say it was a promise, remember?

I'd like to be your friend forever, Aubrey. Even if we have to be apart sometimes. I'd never forget you.