Romeo, I guess that would depend on the nature of the relationship and the breakup, if a certain ex of mine turned up I would run to the hills and hide, while with others I would be happy to sit and have a catch-up. If it was amicable then I am sure she would greet you with a smile but you must first be very sure of your own reasons for contacting her, is it just a friendly catch-up or is there more to it (sorry if that sounds mean but only you know your own mind).
Good luck whatever you decide
warpig