Morning Smellbellina. So much of what you say resonates with me - his depression, the fear of his suicide constantly hovering over your life.
I was in a relationship for ten years with a man who had been badly abused & damaged as a child. I knew he had anger management issues but I trusted that he could never be violent towards me. He needed me, I understood him.
But he did become violent towards me. He didn't mean to, it came from nowhere & was caused by his irrational fears, but it escalated over the last couple of years and I knew that eventually he would kill me. Even then, I found it very, very difficult to leave him. I was afraid what it would do to him. I knew it would break him, I knew he would attempt suicide because he needed me. Needless to say, I had mental health issues myself and could not see that his choices were not my responsibility and I was entitled to put my safety above his.
I had huge support from MN, which made me realise just how much danger I was in and gave me the courage to leave. I also realised that my children (from my previous marriage, & grown up) needed me too, and that I had to put their needs ahead of his. I had choices, but he had choices too and his choices were not my responsibility.
I left him, and he attempted suicide four times in the following months. I felt hugely responsible but I didn't go back. In fact, I moved to another country where I knew he wouldn't follow me because I was so afraid of being drawn back in. I still love him now but I know I can't help him.
I don't know if any of this applies to you or if I'm just projecting. I'm sorry if I've misunderstood but I just wanted to say that you are allowed to leave. You can't help him by staying. Sadly, it's not enough that you understand him & why he does these things, you can't repair his damage. You must put yourself first because you must put your Dd first. She is being damaged by your relationship. It is her normal and she is in danger of repeating it. Please leave now, and stay away, and teach her that this is not how a woman should be treated by a man.
You've made that first step, please keep going. Tell as many people as you can that you are going, and ask their help. Sending strength and 