JanieJane, what your alcoholic boyfriend (ABF) is doing is abuse. Pure and simple. Abuse.
It is dangerous, and it can escalate, particularly if he has PTSD. There are stickies (permanent threads about universal topics) at the top of the index page for the Friends and Families of Alcoholics index page. "What is Abuse" is very helpful. My story is there.
Please take some time and read about this; his behavior could be very serious and he could hurt you. Once someone crosses the line into physical abuse, it is hard to cross back.
You can call your local Domestic Violence center, anonymously, and talk with someone and get some resources and help. They can help you make an exit plan in case you need to take your children and leave suddenly.
I know it is a shock to hear stuff like this. When I left my now XAH, I was so buried deep in his alcoholism and abuse, that I didn't really understand what was happening to me until well after I left.
Keep coming back, we're all here for you.
ShootingStar1