yes, I had an ex-fiance' like that. I would push her away, and let beg her to come back to me...we really were best friends, and she's probably the only one who really cared about me (in a relationship). I just had too many demons to fight, and lost her for good.
This one though...wish I had never met her. Such an angry woman...such a *****, can't believe I was so stupid.
Good luck in breaking it off and moving on...I think it's because we hate to be alone. Better to be in the wrong relationship, than to be without, right?