Deb, In your specific case, the problem might be two things: First of all, he works with her and that constant exposure would make it hard to break it off, even if he wanted to. Secondly, from what you have told us about your H, his pride might be preventing him from making that break once and for all. His thinking of "What have I done to her life?" etc..and no doubt he is falling prey to her words which echo those sentiments, I'm sure.
Who knows, actually.
The important thing is to stay focused on yourself. Take care of yourself and it will make you quite alluring in his eyes.
At any rate, I was trying to say that the length of this A seems to be more related to your husband's sense of duty and integrity, rather than him being hopelessly in love with her. I hope I am right, cause that will be a much easier bond to break--he just has to decide the time is finally here!
