Just wanted to add that i'm having the same problem at the moment, and that I also lost all confidence since then. The gf told me that nothing is my fault, I was great etc. But then I feel like if i'm punished for no reason.
I'm ignoring her. She's always telling me "but you are still my favorite don't worry" but I had to say no. I can't pretend that i'm not hurt. She says she doesn't understand why we can't be friends but I told her that it's easy for her to say that since she doesn't love me no more, while I do.
I don't know if she really meant that I was still her favorite, but I don't want her to keep me as an emercengy exit in case her actual bf would let her down.
Moreover, she chose to break up a relationship because of her feelings, well then it is my right to choose to ignore her to spare mine.