Is there a chance? Hers 7/7/90 mine 10/7/86

We fell in love so quickly and even moved in with each other about 3 months into the relationship and even started off as a distant relationship. Things worked out perfectly. We stuck with each other in our hardest times. But after 3 years I blew it.. she is now with someone else, is there a possibility we will ever reunite? I have a feeling that things could, she still talks to me as if it could, or am I being deceived or am I being naive?