Welcome, might be time to get your life in order. Seek a job, get on your feet or move in with a relative until you can fully support yourself.
He is an addict, there is no cure for his disease, he will be an addict all his life, it is just a matter of whether he is clean and sober or not.
Physical abuse is another matter, to me, it is a deal breaker, it, like addiction will continue to esculate unless a strong recovery program is embraced. Physical abuse is a totally different bird than the bird of addiction is, there are many who physically abuse and do not drink or do drugs.
You have taught him how to treat you, what you will accept, is this how you want to spend the rest of your life?
Read the stickies at the top of this forum and the Family & Friends of Substance Abusers, get a copy of Codependent No More, and, if you can start attending Naranon or Alanon meetings, all will help you.
Keep posting, we are here for you.