[It helps to hear, no matter how disappointed with herself she is. The fact that he can act like nothing is wrong right now, is proof that out of the two of them, he's the better person. Although she shakes her head after a moment.]
No. It's not fair to you. [She really has no right to complain. Especially considering what she knows she does to him at home.]
I know what it's like to not remember things, or to have forgotten. It isn't fair for me to be upset at you for something out of your control. Especially... due to the fact that I know I took yours, once, too.
[Which she's ashamed to admit now.]
I'm not a good person to have on your side. I make mistakes all of the time. Really stupid mistakes... [Her eyes close] But I can't just push Zero away, either.