Don't self diagnose please. Go see a doctor or a therapist and get evaluated if you think you might have XYZ. Please. Maybe because that's what I do for a living it totally bothers me when people label themselves with bunch of labels but no formal diagnosis. ASD is a formal diagnosis. It's incorrect to refer to every awkward behaviors as being "autistic".

And what's with calling yourself "slow". What does it even mean.

Also unless your brother is abusive to you why are you angry at him just because he is different than you? So what he is witty? Who cares. You are your own person. When are you going to see a therapist?