Well, to complete the scenario, by the end the relationship had gotten stale, she seemed to be putting in less and less effort as time passed and was often snappy abd moody and then you broke up, as was probably best for both parties.
After a longer spell single than you might expect, she leapt into bed with some nouveau riche chav and got railed for a few years whilst joylessly receiving his lavish gifts, but still batting her eyelids back in your direction.
Despite some superficial high points, it's debatable whether she has actually developed as a person since your split, and getting back together whilst only remembering the good times runs the risk if immediately just jumping straight back into the not so good times...