I think the biggest part of this whole thing is proximity: How long have you two been apart? I mean, if you broke up fifteen minutes before you made this post then I'd say stay broken up for two or three months and if you still have feelings for her, then persue her. If it's been, like, three to six months then give her a call and hangout as friends. I say as friends because we always remember the good times, never the bad, so you're probably not remember her as she really was. Additionally there's no garuntee that the 'spark' is still there, and you'll need to find that out. Finally, if it's been three or more years, go to a councelor, 'cause yeah... soO0oOky~ Kidding, sorry. Just move slow and THINK things out, don't FEEL things out, y' know?