I did mess up a bit, but didn't play doormat either. I got the letter back, didn't support the affair, blocked them from Facebook, and will be moving out of state soon. Simply working on establishing respect for me as a man and as a person. Not a total loss all things considering. Now for her to eventually miss 16D and possibly me with going completely dark.
This is good stuff. Never be a doormat. Don't beg or act clingy. That will look weak and pathetic to her.