AIO to my boyfriend’s response to my hysterectomy?

My boyfriend (35) and I (32) have been friends for over 10 years. We recently started dating after I divorced my ex husband whose name is blanked out. I have stage 4 endometriosis and adenomyosis, my boyfriend has known about my medical problems for our entire friendship. He has known for years now that I have fertility issues because of my disease. He was always very supportive but now his opinion has changed only because we are now romantically involved and he thinks this decision to get a hysterectomy should be made together as a couple. When we got together he said he doesn’t care much about having kids or not. He is taking it very personal even though I’ve shared with him how serious this choice is for me and I’m absolutely gutted that I have to make it but I think I’ve spend enough time trying to find a way around it and it’s been unsuccessful.

For those that don’t know, a hysterectomy won’t stop endometriosis from growing back but it will stop pain from adenomyosis which causes me debilitating periods. I’ve already had 5 surgeries for excision of endo and I’ve had several organs removed because they were completely destroyed by the endo. I’ll probably have to have excision surgery for endometriosis the rest of my life but at least if I get a hysterectomy I won’t have to deal with terrible periods and extremely heavy bleeding. My periods last 10 days and it seriously affects my life…I‘ve lost many jobs and I’m on disability because I rely on a walker during those 10 days. I also pass decidual casts every month which are so painful; google at your own risk because they look gross. Please reassure me that I am NOT overreacting. First the way he walks to me is not ok, and the switch in opinions suddenly is weird.