get her to buy off on you seeing somebody
I actually did that before. She went with me to the appointment and I told her she didn’t have to participate at all. Of course I knew she wouldn’t be able to sit quietly. It worked for a while. Then she got better and the cycle started over again.
Very, very short version: The last time my wife came out of the hospital, she insisted on moving to a home by herself. It was far enough away that I couldn’t drive over and check on her every night, only on the weekends. She committed suicide after about three weeks alone.
If you leave, as someone else has suggested, it might force her to behave because she will know you aren’t there to pick up the pieces. Or it might lead to something else.
Whichever you do, I would echo others’ advice to get involved in a church. Even if you aren’t religious, a good church is a support organization, and you need all the support you can get.
Praying for y’all.