She had left me and lined up a replacement for me already, and just didn't want to deal with the fallout from I'm actually telling me that, so she just kept making me feel like if I work hard enough she would be able to get over all of the things that I had done wrong. Once I found that out, I was absolutely ruthless about cutting her out of my personal life.

I have sneaking suspicions about her having found a replacement too, she has a new "friend" who she talks to more often and treats better (obviously), and the guy has an interest in her, and she claims she's not interested.

For a while I thought it was a way to make me feel jealous, but now I'm not sure again, maybe this is just the replacement and she's using me, in the way you describe ...

so she just kept making me feel like if I work hard enough she would be able to get over all of the things that I had done wrong.

Any insights on or subsequent red herrings about this whole replacement situation from your experience?