Just wanted to say hello and have you know I'm still here, just haven't been posting. I think your C has nailed it down for you, you seem to have a good grip on the current and now.
You asked if you could make him see what he is losing. I think he does see it, but refuses to accept that he can be happy and is afraid to risk it. YOu know the story.
As far as you making him realize, you already have made him realize and I know you will continue to make him realize. The question at the end of the day I guess is the fear of leaving you for somthing uncertain greater than the fear of risking coming back and falling into the same pattern. If they are comfortable enough with coming back and the fear of leaving is greater, than why leave? The strength of each individual is also a main factor.
You are a good person and have made some great strides. I know you are a DRer for life so you are already attractive, to him and everyone else!