welcome to the unit. Well done for starting this thread.
I am sorry your son refuses any help.I am wondering when you say BPD do you mean
Borderline Personality Disorder
or Bipolar Disorder.?
Do you feel thst getting a diagnosis will help your son..?
I have had lived with a mental illness for over 40 years and have had a child who would not tell me that they were not coping.
When I was in my teens and late 20 s I was in denial and felt my parents and others had a problem. Meanwhile my life was chaotic as I careered from one mood to another.
It is hard on you and I would like to see you getting help and support if you have not already. There are self help groups counsellors,websites and support help lines.
There is support and you are not alone .i