Abusive Husband?

It's my 2nd marriage and I have a 7 year old boy from my previous marriage. I got married in 2010 and I had a daughter and 1 son who is 7 months with my current husband. I came to the USA 2 years ago. In Karachi I was a banker by profession for 10 years and belonged to very educated family. I'm a green card holder, yet to be a citizen.

My husband is not only verbally abusive, but he has hit me several time even when I was pregnant, in my 9th month. I ended up going to the hospital and was admitted there for 3 days. He is an alcoholic and not ready to quit and drinks daily until is is drunk and losses all his senses.

Now we keep on having arguments every 3rd day and he abuses me in front of my 7 year son who he hit so hard his teeth were broken. Our arguments have gone to the extreme. He recently bought his mother from his country. She is staying with us and that's another added responsibility on me beside 3 kids of my own. He is not helpful at all and keeps ordering me all the time, do this, do that, and not even helping when it comes to kids or house work and outside work like grocery shopping, etc.

Now he says I should leave the kids and go back to my own country. He says he would live here separately as he would take away the green card which I got from him, as he is a citizen. How can I go back leaving the kids? He is not willing to negotiate if I say let's live here separately and I can earn income myself and the kids can see both of us. He will not let me live with him. If I were a citizen he would have no choice, but now it's my desire to live with him for 3 years to get the citizenship.

I keep trying everyday and try to stay calm, but am just fed up with every day arguments and his mother who is always showing me attitude and criticizing me in to her family. What to do?

By Sad girl