I was just like you, llama only I was TERRIFED of my son and even after he put me in the ICU for 5 days with a bleed on the brain, I STILL allowed him to live at home and continue his reign of terror. He ruled the house. I have a younger son who rarely came out of his room because it was such a chaotic hellhole and when he did, it was usually to protect me from the difficult child who was a violent drunk. And I was the outlet for his rage.
So I totally understand the feelings here. How and why I allowed it to go on for so long only shows how sick we all were. I felt completely paralysed with fear, fear not only of him and what he was capable of, but also fear of having to act-how could any decent mother think of kicking her kid out onto the streets? I was hobbled by inertia. Was so enmeshed with him, him, him, that I rarely thought about why I was allowing him to get away with his dangerous, disrespectful and repulsive behavior.
It's the hardest thing I have EVER done and I am far from healed, but getting him out of the house was the only way to begin to get healthy. One or all of us were going to die if he kept it up and I didn't want THAT outcome.
Again, far from perfect (I have a couple of threads on here) but I think the first step is getting the difficult child out of the situation that is torturing the whole family and it doesn't have to be ideal for THEM (they are going to resist because the status quo WORKS for them!) it just has to be a place where you can have some peace of mind.
Everyone on this board is a miracle-so supportive, wise and experienced and I know you will get so much good food for thought. You have to believe what they say! I was incredulous at times when I first came here-"I'm supposed to do THAT? I can't do THAT! Well, it's alright for THEM to say it, but their situation is different!" But the members here truly have been through the same types of hell and know what they're talking about.
Hope this wasn't too much about ME (!) I just want to empathise and send support your way.
Strength and courage to you!