often we take the abuse for a long time and then hit a point where enough is enough.
I'm in my own personal hell right now so I'm not really in a place to give advice so much as support. I'm sorry you're going through this.
I highlighted what LNL wrote because it resonated with me and appears to be germane to you: I'd finally had my limit and said in no uncertain terms that I couldn't continue living in the marriage as-was configured, which shortly thereafter led to my spouse leaving. But, as my T tells me, let's say she were to decide to come back. Then what? If she's no different are you going to put up with the same treatment for the rest of your life?
I have to remind myself all the time that I was terribly unhappy, and that even were my spouse to return, I can't guarantee we wouldn't wind up right back in the same boat for the simple reason that I wasn't willing to put up with it any more.