Let me just asd my two cents. I would recommend not having him take you to surgery, if you have offers from people close to you, accept one of these. It helps build your support system and shows that you dont need him, it will also make him feel guilty for not being there for you. If you accept him and have him take you, he will use it as a eay to say "look what i have done for you" and he'll say and think to himself and others that you can't do things without him. You wanting him there is a way to bring yourself comfort, it's like a form of withdrawal that you don't want to avoid.
From my own experience and while this isn't exactly the same as it was self induced, but largely because of the hurt and pain she was causing me i ended up in emergency room last year and passed out in waiting room eith sever alcohol withdrawal symptoms and super high blood pressure. I spent 1-2 weeks between emergency rooms, psych ward and withdrawal rehab centre, she offered to visit me and offered to pick me up from rehab center. I declined both and leaned on family to help me, I knew her behaviour drove me to that situation and having her around would only increase the chances my treatment wouldn't be successful and would be fuel for her to say how she was doing it for me. Also I didn't want it to be ammunition for her smear campaign on me to make her paint me as a bad person
Lean on your family and close friends. They will be very important in the healing and detachment process, leaning on him for anything will only prolong the pain and leave in you a position to be more hurt in the near future
