"Maybe 'cause people keep expecting them to take that chance." Hasn't she just proven that entire mindset wrong? Did she set out to do exactly that, or did it more or less happen by mistake?

If she doesn't care, allegedly, then why is she seeing fit to warn him? Why not keep leading him to believe she was Real? Why admit to it, and then impart cautionary advice?

She's telling him one thing. Her actions say something else entirely.

"You're giving me a lotta advice for someone who doesn't care."