<human>: Throwaway (for obvious reasons), but I really don't know what to do at this point. My father has been a heavy drinker his whole life and was functional up till a year or two ago. My dad's daily routine consists of getting shit faced and just sits home all day watching TV and bitching about life. When he's sober, he's a pretty cool guy, but when he's drunk, he's a very different person. He gets aggressive, incredibly negative, and blames it on my mom and myself. He's tried to quit many times, but it doesn't last long and goes back to excessive drinking. 

Anyways, he'd been drinking all day today and got in a fight with my mom. I went to his room and tried to calm this situation down and he tells me, "This is it, I'm done, I'm going to end it tonight, she only wants me dead". Which isn't true at all, my mom just told him she's done with his antics and wants to leave unless he gets help.

So after begging my dad to calm down and not do anything crazy, I just say we'll watch TV and he goes sure, "Just one last time before I end it". and I lose my shit. I break down crying and beg him to just calm down and we'll get through this. Anyways, my dad calms down and he says he's good and how evil my mom is and how proud he is of me, just rambles.

So it boils down to this: I don't know what to do anymore. I'm thinking of contacting his older brother who lives 3 hours away, but I think if my dad found out he'd do something stupid. Also, I live in California and am (somewhat) familiar with the 5150 law and I'm thinking about just calling the police and he can get the help he needs. Maybe then he'll realize (in a sober state) he needs to take action, and can get better. I'm just worried that if they do hold him for 3 days and he leaves the hospital, he'll kill himself some other way, and I wouldn't know how to deal with it as I already struggle with mental health issues.

Condense the text into a few key points
<bot>: Alcoholic father's behavior and addiction is only getting worse and worse. Mom and son (me) are fed up, he gets upset, and threatens to hurt himself, not sure what to do.