Daddy is a Monster... But is Mummy too for Staying???

So here it goes.....

I've been in a violent relationship with my fiancé almost 5 years. We have 2 children, 4 yo and 2yo...

Since the beginning, we were so in love! He was my boss at the time and I just fell for him. He was everything I'd always dreamt but, he was the boss!! No matter what, I worked hard and went beyond for months... Up until he shown interest in me of course and he got smitten!! And it all went from there I suppose....

I fell pregnant the first time we had sex. Ok. That was a big life changer for the both of us... We decided on moving and living closer to his family so they could help us and be supportive. Not only that but we were further from my family vs his (We lived in Cairns, his family in Brisbane... Mine live in WA)...
We moved and we moved the business with us. That was our money maker and was easy to just pick up and go.

Everything was great. As one would think. We were slowly looking at houses and places to live, looking at where we were having the baby etc etc...
When I was 3 months pregnant, he had a few too many alcoholic beverages and we had a massive fight. He smashed my tv and it ended up with me being pushed and hit.
I went to the hospital, police came and they put a DVO on him for him to be of good behavior towards me.

I went home to him. Court with him. And stayed with him.

This was and is the father of my unborn child and I didn't have a close network of my own at that time. He was my one and only... So ultimately of course I was going to stay with him....

For a long time, I went through alot of pain. Many fights. Many endless nights with a newborn baby. Many emotions.... I breached him twice on his DVO because of circumstances and he hit me. I stayed at a shelter on 1 occasion because it got so bad that I didn't feel safe at home.

But, I always went back. I loved him and he shown he loved me. He promised change and that he would look after us financially...

I fell pregnant again with our second child. One would think that the icing was solid on this cake now and that it would be a real changing moment and that he'd give up the booze, the gambling and be a family man...

But no......

I've had enough though everyone. I well and truely have had enough and realistically I don't know what to do.

Since the birth of our second, the first DVO expired (2 yr term) and another has been enforced by police. He has breached it twice. I've stayed at a shelter with both my children 2 times... I even flew home to WA for 2 weeks early last year with my baby (breastfed and he wouldn't let me take my oldest child) and it was peace and happiness. I hadn't seen my family since before I met this man! And it had been years :'( but I went back. He manipulated me to go back. He did have our oldest child that missed both me and her baby sibling..... Things got better. And then things went back to worse. Another stay at a shelter and now I'm currently living on my own in my own place...

We separated for good 4 months ago. But he manipulated his way back in via the children and the last 3 weeks he has stayed here.

When we separated, he let me take the car (financed In his name, registered and insured in my name). He let me take 1/4 the furniture and 1/2 my personal and children's belongings.

It was good when I done this initially 3 months ago. But since he came back in its gone from bad to worse :'(

On Thursday last week, we had an argument. I lost control because he hated the fact I'm depressed and I don't like to wake up in the mornings. I told him that I'm like this because we are going back into the repeated cycle and I fear it... He went crazy. I tried smoothing everything by saying we need to take steps in the right direction and make goals to achieve. He took it the wrong way and threw everything in my face. I was really trying! Clearly he wasn't!
So I told him to leave. He left.

Next day, we sat down to talk and he confessed gambling $350 that previous night. At this moment we don't have that sort of money spare and I told him i was upset about that. He should've went home to his own place for the night. Not that. I said I was upset about it and he threw it back at me and we argued, yet again. He said he was taking the car from me and that it was his car. He said he was going to report me for fraud and put a DVO on me! And he said he was going to take the children away from me.
I told him to leave. He left.

Next day, i hear he's been in a police chase (in his car that is registered and insured in my name) and he crashed the car with alot of front end damage.... He lost the plot altogether..............

Now. I really don't know what to do.
I've told him he's not welcome back to my place. I told him to transfer the registration and insurance because I'm not paying for something i don't have and is not mine...

But really... What more can I do. I can't go back. His family alone have had enough of this bull that's been going on. And my family are worried sick.

I wish i could just leave QLD and go back home. But i hate the idea of leaving my children's father :'(
This is not what i wanted.... But have i made it worse all this while? I blame myself for his actions... But how else should I feel when I feel like I've created this monster?????

Please. I really need advice. I'm sorry for the long post :'( but better to explain in plenty of detail the story.

I hope someone can shed some light on this. I'm almost in the dark......