I was you six years ago.
I tried everything I could to fix my twenty year marriage to a man who was cold and detached, who told me he wasn't in love with me, but he still loved me. Then a few months later that he didn't love me but he cared for me.
He stonewalled me, belittled me, made fun of me, humiliated me, ignored me.
I stuck a year of this cruelty, was on ADs, lost too much weight, blamed myself, nearly had a breakdown. I made the massive mistake of taking on the responsibility of trying to fix our marriage on my own. He made no effort at all.
When, after a year of this I threw him out, I started to heal. I can honestly say the year post breakup was a hundred times better and easier than the year pre break up. I filed for divorce, my solicitor said I needed five incidents of unreasonable behaviour. I gave her a typed list of twenty five. I think I could have cited fifty if I'm honest. She used the top five on the list, read the rest and said I had suffered a year of emotional abuse.
It nearly broke me OP, please don't let it break you.
I should have thrown him out a year before I did. Yes I knew I had done everything I could to fix us, but the price I paid, mentally and physically was huge.