If this is what she's become why would I ever be interested again?
I'm a newby and maybe not yet cynical enough, but what I took from this statement is that you need to assess which person is real. Could she have been faking it for 14 years or is she faking it now as an emotional defense? I would think the latter. In which case, its a good person doing a bad thing. Happens all the time. Welcome to humanity.
I think that if you ignore her acting then the acting becomes wearisome, natural human laziness takes over, her real nature reasserts, and eventually the person you knew will re-materialize.
In the meantime, figure out if the person you knew is worthy of the person you are becoming.
