They mention a 'traumatising conversation' (and by conversation I mean her getting emotional and me telling her she's being pathetically emotional, y'know, as you do) you two had over a year ago online to someone else, accusing them of being you when you weren't even remotely near the thread.
I must say, I laughed. I laughed hard.
When do you know you've got to someone/made a big negative impact on their lives?