I have indeed interacted with such people before.
Humans tend to do things out of necessity, and when a dire necessity arises, it can be remarkable what a person is able to do.
A long, long, time ago, before internet or even TV was around there was no such thing as Assburger's syndrome, or for that matter ADHD. People had much more of an incentive to go outside to do many things. Nowadays a person can spend many, many hours inside of the house while avoiding social contact, and not have it be so bad because they can find themselves pre-occupied with their computers and televisions and whatnot. When this happens social isolation ensues, and after social isolation lack of social skills ensues. It's very basic logic that people become better at things the more often they do them, and social contact is no different. In the old days people were more often forced out of necessity to spend their days outside doing a numerous amount of tasks. Assburger's syndrome did not exist back then. I think it's a shame that people nowadays find a reason to call almost every abnormality of a person a disease. I think it's more of an excuse, and there is also an economic incentive with the hiring of counselors and psychiatrists and whatnot. The more diseases there are, the more these people get paid, so of course they would like to come up with more of them.
If going to the supermarket is a "low level military operation" for you, then I suggest you take a deep breath, collect yourself, and proceed to do it anyways. Go to the supermarket every single day, and force yourself to do it if you have to. If there is a cute girl working the cash register, force yourself to casually smile and say hello to her whilst approaching your turn at the check-out lane. As with most things that are improved with practice, I guarantee you will get better at doing this if you keep doing it every day, and it will cease to be a "low level military operation". If you are really up for a challenge, smile and casually tell the girl at the register that her hair looks nice that day, if you can manage to pull this off without being a creep, then by God you are cured of Assburgers syndrome. Once you have achieved the great task of going to the supermarket to achieve the simple and very necessary task of shopping for basic needs, you may decide to take it a step up and actually try making friends or reconnecting with ones you haven't talked in a while and perhaps even going to a party.
I mean even when I go out to buy cigarettes at a small establishment, it's not unheard of me to make small chit-chat whoever's working the register. It's like there's always some dude behind a gas station counter ready to talk to me about the weather, whine to me about taxes, sometimes even make remarks about ethnic minorities. Those guys are often bored as fuck from their jobs and will chit chat with just about anyone.
I challenge you to do this: find a friend with a car, and tell him to drive around and drop you off at a random ass place where you'll be forced to ask people around for directions, and maybe even about bus schedules and routes.
I'm sure there's many, many more exercises of this sort, also living in a big city helps.
Perhaps one of the best solutions of all might be to actually engage in intimate relations with the opposite sex. Girls love to open their mouths and talk and yap yap yap yap about absolutely nothing. But you're just too into her to care that she's doing this. After a while you might actually get used to this and be able to keep up with what she's saying, if not that's okay too, because now you are at least comfortable with it
