Okay:
You know what????
Reading this about your son, I thought: OMG! My sibling was and is... JUST LIKE THAT!
I thought you were talking about my sibling. A sister I have.
Yes, it is difficult.
Yes it was hell, for my parents and me, literally... while she was growing up. Yes she was difficult since she was born. AND all the way until she was an adult. Then, she was a difficult as hell, adult.
Highly successful and genius intelligence and uber sensitive etc. She is just like, your son.
Anyway, it was HELL for me, as her sibling. She treated others like a doormat. Then nothing was her fault etc. Ever.
All her life, she had bad relationships, bad choices in friends, just dysfunctional all around.
Abusive, even. To others. Because, they think they are so "smart" etc.
But the flip side is: no one likes them. Even their own family.
So then, they are in emotional pain.
Oh and yes, she was so much nicer to her friends and peers and Teachers. Just a Jekyll and Hyde.
And, we were raised, the same.
But she was just... a hellish child.
Anyway, the bottom line is:
They need, professional help. AND to be, assessed and diagnosed.
Because, no matter how smart or gifted a person is... acting like that, is simply wrong.
And they cannot control themselves. Their impulses and moods.
So anyway, my sibling, one day she just seemed to become normal. After ALL these hellish years.
Why?
She apparently was seeing a Psychiatrist and has meds.
Though she will not admit it.
But I know.
She is now "normal" and seems much happier.
You see... her being that way was was NO ONES fault. It was her's.
She is just, imbalanced.
And it is just beyond being "strong willed."
When it is that bad... it is just dysfunctional, and Toxic.
And something, needs to be done.
People like that, are in a sense, ABUSIVE.
My sibling at that age... gawd, you should see how she treated my parents. And my parents tried all kinds of things.... to help her.
Then as she got older, she just was a time bomb.
*At some point, something has to be done, to help him. This is beyond, what a layperson can do, or a parent. Professional help, is needed. The adults/Doctors, seem to just not take it seriously and just say he is "smart" and unique etc.
But this is also, not normal. Not all smart/confident/genius kids, are like this. Nor adults.
And yes, you need to be concerned... and get him properly diagnosed.