Hey Deb and I both admire you for looking for the help to end this thing before it does more damage. You are not a wuss. A wuss would not be here looking for help he would have kept on doing what he was doing.
Deb's post was really good listen to her. End the affair and think about telling someone about this it will help and people are understanding. Deb states like I said your wife may not know about the affair but she knows something is up.
Ge the book NOT JUST FRIENDS it is helpful it talks about why affairs happen what you are thinking and it tells how to end them. Just do it.
Tell other woman you don't want to have contact with her ever again no phone calls no letters no meetings and no emails. Dont sweat a long ending just say it and do it.
Yes you have blame but stop thinking that the ow doesn't she knew hwaat she was doing. Share the blame lighten your load.
Work on you and the marriage forget about her. Yes if you were friends before you may miss her but would you miss the wife and children more? Is there a real choice there or is it a sure win for wife and family?