I have been married for 44 years. Only once did my husband say anything about my fluctuating weight and it hurt me beyond anything I thought could, which was probably the point. I had a great job, two kids under 10 and really low self esteem anyway. The pressure was immense, for both of us but he would agree I did most of the home and childcare chores. I cried and cried and when he came out of his probably alcohol induced moment of extreme bad judgement he apologized forever. But you can’t take that shit back, you have to make it up in another way. The comparison to OP story is that I knew I needed to lose weight and I knew I would. I gave him three choices, get your stuff together, we will sell the house and I’m sure you won’t want the kids, contest and it will take every last dime we have or the last one, seek therapy for your crappy ass temper and get your shit together. Show me written proof of these therapy sessions after the two weeks you stay somewhere else and figure out if you like being alone. He picked the last one, therapy was a freaking godsend for him, he worked out a lot of issues about his crappy upbringing and we have had a great marriage since. I say don’t do anything rash and try to talk her in to seeing someone. Otherwise good luck and remember, this too shall pass. If you are not meant to be together so be it.