Is it wrong to fap to a possibility?

A friend I've had, a girl, known her since high school, and we've talked on and off for a long time. Mostly online, but we've hung out at bars a couple times, just friends. I get the feeling recently, especially from our last conversation that it might become more...i'm really hoping it might become more. I like talking with her so much, and I've always found her pretty. Is it wrong though, that this simple thought turns me on enough that I wanna fap to it?

>>11
Same goes for me. Some people are too innocent to tarnish that image in your head.