There is a good probability of a quick fling, a mostly smaller one of a lasting relationship. But you always risk losing a friend.
I guess each person has to decide what they value more. I'm not sure about myself. I think a lasting relationship has to be built on top of a friendship, anyway.
Or maybe none of this really matters. Maybe you either click together, or you don't.
Thought Exercise: Are you a hopeless romantic? Why/why not?