How?

I remember her saying the words over and over in a tear choked voice. "He pushed me away". This thought keeps going around and around in my head now. Does this mean that if he had not pushed her away that she would still be with him? And if so, what does that make me? Am I just some sort of safty net? Someone to fall back on when the one she wants ignores her? And what if he for some reason decides that he would like to fire things up again? Am I to just sit here waiting for someone else to decide my fate for me? But what other choice do I have?