Just another "how does she feel about me, what should I do" type of question...!?

I met this beautiful girl on a school bus, that day is clear in my memory as if it was yesterday. I was walking down the bus isle and saw that she was sitting alone, so I asked her if the seat was reserved. I sat down and took out my book, I started to read and suddenly she turns to me and asks "pardon me for asking but is that Russian you are reading?" and the story, intervined with love, became the most memorable fragment in my life, and then it ended, as all such things are ephemoral. We have all been through these relationships before. My question would be this. Imagine that when I sat down and opened my book, she turned and asked the same question, but suddenly I would have had this flashback of the future in an instant, I would have seen every single detail of that relationship from beginning till end, would I have answered her question or would I have just looked into her eyes for a long time, stood up and left, to never speak with her again. I can't answer this to myself. But if such thing were to happen to you and before replying to her or his first question you would have seen it all, would you have responded, or simply left?? And please don't tell me two of the most obvious answers 1. I would leave because knowing the future why would I want to relive it and 2. Yes because future is inevitable and we have a destiny that can't be changed.