Lyric discussion by MosesConspiracy 

Cover art for Black lyrics by Okkervil River

I think there's even more to it than that. She isn't just saying "no forget it" she saying that she doesn't want to dignify what was done to her by responding to it. So while he's singing about making him pay for it, he's also proud that she won't let him get revenge.

Or, uh, something like that.