That statement about knowing you are a good catch , tells you right there that this is about HER not YOU.
My H actually said something very similar to me. He told me I was a great person on many occasions. I still wonder if I'm so great then why don't you want me? I have just come to the conclusion that this is about him and not me b/c I am a good person with so much to offer.
I think you are doing the right thing by closing this chapter in your life for now. If and when you W does change her mind ( most likely she will) make sure you take her back on one condition , that she gets some therapy to help her with her issues. Be careful ,, I would hate to see you get hurt all over again.
