Ex-letters

Girls, explain this to me. Why does one of yours like to pour salt in old wounds? My ex-fiance likes to shoot me an e-mail or facebook message every couple months, my question is why?

First off let me explain; we started dating in college, after 18 months I graduated and moved to Florida. We tried long-distance and it seemed to work for the 1.5 years I was in FL. We got engaged and started planning. I moved back to TN 2 months before her graduation. I was sick and tired of being lonely and was ready to be back. I spent my weekends in murfreesboro with her. 2 weeks after returning she starts acting real frumpy, being very down trodden. She soon dumps me. One of the biggest reasons I came back was for her. I missed her and thought she missed me. Not to mention her biggest concern about marriage (that she told me) was moving to FL and leaving her family. I was willing to give up a well paying job with a multi-national corporation in a beautiful city to make her happy. She just apparently was to 'scared' to admit she was having doubts. If she had said that a couple months sooner I wouldn't have been in a hurry to come back like I did. I think I would have eventually anyways, but I could have made better plans and saved myself a lot of frustration.

Anyways back to my point, why does she insist on keeping sending me messages. I tried at first to be friendly. Maybe she still needs some sort of closure or validation over a guilty conscience. But whatever the reason, she shoots me these messages asking all sorts of friendly questions. So I respond politely never even bringing up the past, trying to show no hard feelings (they are there but that is my issue to deal with not hers.) But each time I respond, this seemed to be enough and its quite again for another month or two.

What sort of schizo, hair-brained lunacy is this? Can she not make up her mind as to why she needs to keep in contact. We live 100 miles apart so its not likely to bump into one another, is this just her way of staying 'friends.' If so it sucks, friends carry on conversations not just send one sided messages every couple months. Please, please someone clue me in! I know my Y-chromosome makes it difficult to explain things to me but will someone, anyone, please try.

Update - today 3-5-09, I received a padded letter from my ex. Not an email, a first class package with my old fraternity letters & some pictures she took on her last visit to Chattanooga.