I have an extremely bad word that I would call this person but since we have to stay civil here you may use your imagination freely with words you would deem appropriate. It seems to me that she is insensitive and lacks the empathy it would take to make a lasting healthy relationship. I wouldn't be at all surprised if she dumps this other guy for yet another guy and treat them exactly as she has treated you. I love how you symbolically ended the relationship, cut the ties if you will, by giving that object back. That was good.
Carrie

<font color=blue>If you have two dollars, spend one on bread and the other on flowers. The bread will feed your body and the flowers will feed your soul."--Arabic Saying