[ she doesn't interrupt him. her expression stays passive in the face of karkat's temper. she waits until he's done, even lets a few extra seconds pass before she answers, her own voice staying quiet: ]

You are my closest friend, Karkat. You are special. I was not myself then. If I had been, I would have never broken the promise I made to you. That does not take back what I've done, and I do not expect you to forgive me, but it is important that you understand I did not leave you intentionally. I would not.

[ a slight pause ]

If you doubt my strength or my honesty, then it is deserved. But I cannot allow you to doubt your importance to me.