OK, if it helps, I can relate to 99% of what you wrote. Pre bomb. I was feeling and living what you describe. I didnt know of course he was giving his care and attention to someone else, he was not a suspect, so it all became VERY personal. I am dreading the thought of being again in that place. This FEAR makes me sweat at nights...
What are the unresolved issues? If you failed to resolve them then, cant you go back and resolve them now?
Weight can be devastating for women. It alters their mentality, vanishes the self esteem, gets you in the "looser" role. That is something you need no help from him with. It's about you. YOU can change that. Deal with it. It will change you. If you are anything like I am, weight loss will be the beginning of many more changes. I will be back later. K