Good evening,

This problem may look like something stupid but it's really getting me down.
I lose all interest I have in a man, something like two weeks after we start dating. It has always been like that. When I was 20, it was a kinda game. Just checking if I was able to date that cute guy, or the one every girl was looking for. It's normal not staying too long in a relationship when you are in your early twenties but now I am older and the situation has not changed. Once I have someone, I break up shortly after that. 3 years ago I let the relationship continue till the wedding proposal (he was not pleased when I broke up). I am with someone now and to avoid a bad break-up I askmy transfer to the other side of Europe.
Some of my friends think I am not the commitment type, and the others think I 've never been in love and that's all.
I think there is something more but don't know what. Can someone help me out? This is really driving me mad because I really want get married and have kids but can't see a way to achieve these goals.