He started hanging out around here after the antidepressants cut in. The diagnosis was general anxiety disorder and depression, with some OCD. The anxiety disorder is debilitating. Having OCD is kind of neat.
The anxiety runs in the family.
He's quiet, and doesn't smile much. If his smile is shallow and symmetric, he's doing it because he thinks it's appropriate for the social context. If it's lopsided, and he looks like he's trying to fight it back, it's genuine.
He usually doesn't filter the truth, especially if it's negative. "You have a way of telling truth to power", one of his co-workers said, once. He can keep his mouth shut if he has to, but he will almost invariably answer questions directly and honestly, even if it's not in his best interest.
He doesn't like physical contact. He'll tolerate handshakes as necessary, and hugs from relatives. If he's handing you an object, he'll make an effort to avoid contact. He'll also make an effort to avoid looking like he's trying to avoid contact.
He continuously rehearses the future, and reviews the past.
He doesn't get out much. His car is 14 years old, and has 57,000 kms on it. He hates it when you comment on this.
He's a 41-year-old virgin who lives with his mother. The anxiety disorder is debilitating.
He's had the same job since he graduated. They pay him for sitting around solving math puzzles. Having OCD is kind of neat.
He has difficulty with positive reinforcement. Graduating at the top of his class in high-school was awkward. Graduating at the top of his class in university was traumatic.
He has no trouble reading your emotional state from your expression, body language, and tone of voice. The problem isn't that he doesn't feel sympathy, it's that he doesn't know how to express it.
If it seems like he's doing something nice for you, he has an ulterior motive. It means he likes spending time with you, and thinks you should have some sort of compensation for tolerating his presence. He is careful to stop short of the point where it appears he's trying to buy your friendship.
His self image is severely distorted. He is intelligent enough to recognize this, but not strong enough to edit his own psychology.
He doesn't have many friends.
He has difficulty remembering faces. Maybe he has a touch of prosopagnosia; maybe it's just because he avoids eye contact.
Sometimes, when he's conversing with you, you're talking to a real person. Sometimes you're talking to an emulation, generated in real-time, of how he thinks a human would behave. You can't tell which is which. He can't either, sometimes.
He has seriously considered, but never attempted, suicide. If he had, he would have gotten it right the first time. The antidepressants have almost completely stopped these thoughts.
If you're intelligent, female, and between the ages of about 20 and 35, there's a chance he has a slight crush on you. The only outward indications are that he will avoid eye-contact more than usual, and might stammer a bit if you say "hi" when you pass him in the hallway. Don't worry about it. He's harmless. He'll get over it. If you express interest in him, he'll pretend he doesn't notice, even if he likes you back. This hurts like hell.
He's imitative. If he spends enough time around you, he will absorb part of your personality, your vocabulary, even some of your abilities.
Unless you're watching very, very carefully, you can't tell there's anything wrong with him, other than some shyness. He's good at faking normality. Or thinks he is.
He doesn't see reality the same way you do. He doesn't experience it the way you do.
It hasn't occured to him that he's autistic.