What Cyllya said. Also like ElsaMars my youngest son, I suspect has Aspergers/ADD, we are attending diagnosis tomorrow after years of struggling with the system. Whilst he struggles with his peer group he has a major charm offensive with those older or younger than himself. "Instantly adorable in a quirky kinda way."
I also write collaboratively with someone who is high functioning, with ADHD and fybromialga, and he is quite possibly one of the most gifted libertine/romance authors I have met. His work can quiet literally reduce me to tears or have me crying out for more in the space of a page or two.
Having spoken to him on Skype also I realise that he has that same intensity in conversation so I can understand how people might find that difficult to filter until they know him better and he relaxes. Then his obvious charm and charisma shines through.

@Shad every thread I see you post gets a tin of replie, so I don't think gaining attention or charisma is your problem, I suspect your every bit as charismatic as you need to be, if only you stopped focusing on your brother and every perceived (or genuine slight) life is too short Hun.