After reading all of your posts, I asked AS what his "trigger" was. He said he just wanted to from escape reality. So he is not connecting the dots...he had just come back from a week of job training where they put him through the wringer. He was completely stressed out and I'm sure THAT was his trigger. But if he can't see the connection, then I don't hold out much hope for him, in that respect, until he can understand himself better.
And thanks everyone for reminding me I'm not alone and reminding me that I can't help him. (I had reverted back to being a normal mom and helping him whenever I could, for the last 9 months!)
Barb