Help Please, I don't know what to do
Wow. Thank God you don't have to go back to using the same old tool of stuffing your face and taking all this in and accepting everything as being your fault.
"After much delving I discover that among many other issues, his big problem right now is that I had the gastric bypass when he did not want me to and that I have had plastic surgery. He hates that idea of me being naked in surgery and other people seeing me. He tells me that he's not sure how this will all work out." These comments that the core issue of your having surgery when he didn't want you to do so make me wonder whether he feels like you are slipping away from him. You are a new person inside and out. You don't think like you used to think. You don't act like you used to act. He doesn't know how to process that.
When you first met, how did you relate to one another? Was it easier for you to let him be your everything and make every decision whether or not you agreed? You have changed in how you handle things. Your outlook on life has changed.
I am not saying any of this is your fault, please believe me on that. I am just stepping back to look at this with a wide angle lens, so to speak. I would pray and ask God for the key to this whole situation. There is a root involved here that goes beyond what he is saying. Is he overweight? If so, does your weight loss success make him feel like a failure?
I will be praying for you.