I can so completely relate to your post. I would love to throw my oldest difficult child out of my house! I can't do it. Why? Because due to circumstances of his life, there is not one moment of doubt that he would commit suicide. I have already dealt with 2 police chases with him, some day it will likely be the end.
I am so sorry it is so hard for all of us. I wish I had an answer. All we can do is take a day, sometimes a minute, at a time. You'll be in my prayers. I know it's hard.