Breakup has left me a mess, Advice needed.?

The reason why she probably broke up with you is because she might have stopped liking you. It's not your fault at all! Some girls just can't hold on to feelings/ commit just like guys. My friend was totally into my guy friend. But after a while she just started to lose interest and even she didn't know why. All you can do is accept it and use your knowledge of this relationship to help another. About the marriage thing if you do feel that way during engagement and even earlier then maybe that persons not right for you. Maybe for a next girlfriend try to be spontaneous, keep her on her feet.