The long post SteveLW wrote above is absolute DB gold. It’s incredibly accurate and appropriate for your situation. IMHO, it should be added to the stickies on this forum.
You are getting incredibly good advice for free, from veterans who have been through this, that you are too available to her and you need to flip that 180 degrees and focus on YOURSELF.
And how did you respond to that advice? You wrote a whole lot more BS about your crazy wife and what she may or not have been thinking about in the past.
You need to read Steve’s post again, print it out, digest it, and stop writing to us about what your crazy partner might have been thinking/saying/doing in all your previous interactions in the last few years.
I’ll ask again, because you ignored me last time - what are your GAL activities, hobbies, sports, social groups, interests - and do you have a solid exercise regime? Please tell us about those. There’s not a psychologist on the planet that won’t tell you lots of hard and physical exercise is the BEST thing you can do during a relationship breakup.