<human>: Give me the gist of the text in a nutshell

My boyfriend and I have been together for a little over a year, he's incredibly tough and amazing and i love him so much. His dad is crazy, he's irish (so it explains the short temper and alcoholism) and he drinks a lot, but even when he doesn't drink he becomes abusive.

Mostly, he's verbally abusive, but sometimes it can be physical, and it scares me so much. My boyfriend is tough, he's strong and can handle anything, but I can't even count how many times he's called me sobbing because of his father. He will hit him, choke him, and hold him against walls and its always for the silliest things. If his father called him and he doesn't answer right away, he believes its disrespectful, calls him a horrible son and an asshole etc... and this will continue until about 3am when he's ready to pass out. 

His mother is the sweetest woman in the world, but she's helpless when these things happen and she can't stick up for her children because his father threatens to leave her when she does. 

Its a horrible situation and he's a terrible man, I don't know what to do about it anymore. I can't handle another phone call with a cancellation of plans followed by a river of tears. its heartbreaking. I know i can't call the cops or get involved legally, that would be too much, and I'm afraid to do so. help?
<bot>: Boyfriends father is very very abusive, his mother can't do anything about it and I don't know how to help.