Jackie,
having seen you on the other thread, I thought I would post here. There have been about 4 threads since your first one, and I just wanted to post how pleased I am to read your progress.
Yes, it's tough. Lots of us know, because we have been there, honestly! But in time, you will start to feel so much better, you may be starting to already!
I'm sorry that things ended the way they did - it must have been very traumatic (and he acted like a dick), but in a way, the extremeness of his behaviour perhaps did you a favour (in the long run, I'm sure you don't see it now) because otherwise you could have gone on for so long knowing that his treatment of you was really dysfunctional, yet not having the strength to actually do anything about it.
So much of how you describe your ex relationship reminds me of a guy I went out with - so turbulent - great, great times, but awful ones too. He had an ex wife, who I felt pretty insecure about - looking back, he clearly played one off against another and enjoyed creating a climate of jealousy and drama. In the end, I couldn't tell what was my fault or not, and I was exhausted from all the emotional drama. I wanted to understand it and try to fix it, but it was unfixable.
Fast forward about 16 years, and I am able to see it in a dispassionate way (I'm not saying to has taken the full 16 years, that's just how long ago it was). Have been with DH now for the last 12 years, and yes, we have our minor spats, but it is for the most part a warm and loving relationship - so different.
You will get past this. Well done so far.