Hi Mamakim! Glad you found us.
All of us come to this forum with some heartache... .life certainly not what we wanted it to be.
Sounds like it has been a roller coaster ride for you. There was a rough beginning... .then your son agrees to go to DBT training, gets on meds to stabilize himself... .all is rosy. How difficult for you when he made the decision to come off his meds and seems you are back to square 1.
If your son has anger issues, I agree with your friends/family that you should keep yourself safe and if that means not being around him... .so-be-it. That is a difficult thing for a mother to do. I know that all too well.
Our saga with our uBPD daughter has gone on for about 40 years now... .ups/downs/ups/downs. When things were good... .they were very good. When things went sour... .her anger would flare. We were warned that her verbal abuse could well turn to physical abuse... .and finally the time came when we knew we had to take a stand. She had to agree to joint counselling with us... .or we kept our distance from her. She is adamant joint counselling will never happen. She was comfortable with the status quo... .wants life to continue as it has in the past. No!
It is good to read that you participated when your son was going to DBT... .and good to read "I learned a lot." Bottom line, Mamakim, is that we all make our own choices... .we can't change others... .we can just change ourselves. Your son is making choices that are not good for him and that is, indeed, sad... .and frightening to you as a Mom.
I encourage you to continue being a participant on this board. You can see to the left

that there is so much information available on how to deal with someone who shows BPD behaviours and, just as important, how to look after yourself. Your story does resonate with others who face similar problems. It is good for them to know they are not alone... .it is good for you to know you are not alone. Feels good to help each other... .get much needed support. Keep us posted.
From one Mom to another... .a hug.