I am looking for impartial advice from a female perspective regarding the possibilities and potential pitfalls in pursuing an ex-girlfriend's best friend. I met her only once, when I was still dating my ex, and obviously couldn't act on the attraction then. I'm pretty confident that she would be interested if there were no complications, but I don't know how loyal girls are to their friends in situations like these. Even though the break-up was mutual, my ex is still a little hung up on me, and probably wouldn't want her friend to see me. It's a complicated pursuit, but I'm so incredibly attracted to her that I'm going to attempt it anyway.
What is the best way to approach her? Meeting spontaneously isn't going to happen due to geography. It would have to be a planned meeting. My initial instinct is that I have no choice but to contact her through FB and admit the attraction outright, that to start slow would seem inappropriate and sneaky, that a dramatic seduction is my best and only chance to clear the hurdle of history. Am I wrong about that?