I feel very bad for those that are going through this.
I do not know much about your situation, nor am I qualified to direct you.
However I will offer my observation of other situations similar to the ones you described.
I have read that you have a hard time accepting him for what he is.
Let me just tell you, that first and for most, never ever throw him out of your house, never make him feel like he is not wanted.
Do not try to ‘teach him a lesson’ as this will backfire.
Children (read ‘teens’) today, are not similar to the teen you were, they were brought up in a much different environment.
even if you cannot really bring your self to FULLY love and FULLY accept him, make believe and try to force your self to accept him.
Have private one on one talks with him, go walking with him (This might not be appropriate in your area, so take a small trip someplace else).
Dont be the one that talks about him. rather talk WITH him, make him feel accepted and wanted.
Believe me, those ‘friends’ dont REALLY care about him, nor are they interested in helping him with his issues (I am sure that are a lot).
You are his Mother, you should be the one that he relies on when he needs some Motherly love!
Also, make sure to validate him.
another point ( I am sure that a lot of people mentioned all of this, forgive me if you are reading this ‘advise’ for the thousandth time..)
is to make sure that you have his laundry prepared, neatly and his suites/pants/shirts ironed.
His Breakfast nice and fresh. his lunch nicely packed with a piece of cake wrapped. leaving a note wishing him a good apatite, goes a long way.
You might think that these ‘small’ things are in vain, however this will leave the message that “you have a mother, and she really care about you”.
What I really can do is hope and pray that he should stay our of any harm and you should be zoche to see lots of Nachas from him!