Angry Husband

My husband has random angry fits where he can be verbally assaulting or intimidating and on few occassions physical. He throws things, yells, curses, etc. His outbursts are scary. I lost my mom less than 2 weeks ago and that didn't deter him from his angry outburts where last night He's threw himself twice off the couch to convey his anger. He also started throwing things and i had to beg not to in front of our son and to stop. What is this? Hes also had history of depression and cyclical alcoholic bursts. This has been my life for the past 3 plus years and weve been married for 5. I'm just tired and heartbroken. Im beginning to feel dead inside. Like im just functioning not living.