it's all manipulation, and from my experience - that's usually a symptom of active addiction. And when someone threatens to kill themselves, call the police. They will never threaten it again.
First of all - you are NOT responsible for taking care of a grown man.
We take care of our children.
We take care of our aging parents.
We take care of ourselves.
There is a great book called Codependent No More by Melody Beattie.
Another book about abusive men (includes others too) called: Why Does He Do That by Lundy Bancroft
You can check on meetings in your area: CoDA, Naranon, Alanon
Read all that you can here about addictions and relationships, etc. Expecially the stickies at the top of this forum.
We are here whenever you wish to share, vent, learn and need help.
Hugs to you during this time,
Joie