New and need help

I am completely new to this chatting thing. I don't have anyone to confide in so I am trying this as therapy. I am married to a bipolar ii patient. We have been together for 19 years. I thought things were bad before but a year and a half ago he finished chemotherapy and seems to be a lot worse after it. Everyday is a roller coaster. He says almost everyday that he is going to commit suicide and has rages. Our home is a scary place. I know it would probably be better for my kids to not live with him but I am pretty sure he would kill himself. I don't think the kids would ever get over that. So I'm stuck. He is mean to me-violently, always looking for a way to sneak around on me, and a **** addict. I feel stuck because there is no way out without something bad happening that will hurt my children forever. Is there anyone with this disorder out there with some advice on what helped you or a spouse that has been through this and came out of it well? I'm finally at my last straw. My spirit is finally broken

It seems like a no win situation, but you are the ones losing, you and the kids. Leaving him to flail on his own is not going to cause him to commit suicide. Staying with him as things are is enabling him to continue on the same path. And he could commit suicide anyway.

He has a long list of problems to address, HIS problems. Instead he prefers to be an addict, and abuse you and the kids.
That is not acceptable, I don't care who you are or what your problems are.

Call 911 when he gets violent next time. Let him sit in jail and think it over. Pack his clothes and personal items and tell him that he has to leave.

This is no home for your kids. Not a childhood they will enjoy looking back on. He has to leave so that they are not up-rooted.

If he's suicidal, he can take himself to the ER. He's threatening you with that too. Controlling you.

This is the holiday season. Do something so that you can have a holiday.
Quit feeling sorry for him. He is manipulating you.