Most of the time, I only belatedly realize someone has been trying to flirt with me days or weeks or months or years after the event, or else when someone angrily points it out to me and demands to know why I did nothing to reciprocate. I don't think anyone has attempted to flirt with me this year, but that needn't be because I've suddenly become a repulsive human being; probably more because I seldom leave the house these days (which is partly because I've learned some big advantages of solitude, altho' yes I would describe myself as lonely, but I'm not complaining about that ... much).
However.
For the record I can state that, despite having no body nor looks worth mentioning (obviously I am not actually some invisible disembodied spirit, but you know what I mean), I've had young girls flirt with me that were so young it was on the fringes of illegality, or at the very least indecency (to be honest, I think sometimes schoolgirls do that just for practice, like a kitten playing with a piece of string even though it knows it doesn't actually want to eat the string), and I've had women about the same age as my mother flirt with me (and I had relationships with two from the latter category). So I feel we can afford not to get too preoccupied about our looks, our physique, or our relative ages vis-a-vis the ages of any females we might meet. It seems to be as much a matter of fate and chemistry and sheer dumb luck as anything.
Flirting is a handy skill or knack or trick or aptitude to have up your sleeve, but the fact I ever even lost my virginity in the first place proves it is not essential.
Re. turning off the extraneous and the distracting to focus on the one preferred thing, yes I know that's very useful for those of us with hyperactive perception and a visceral desire to process absolutely everything to the zillionth degree: I know this because cannabis used to enable me to do it (I cannot enjoy, for instance, music, nor sex, fully without it); but I would be wary of prescribing or recommending cannabis to the entire A.S.D. populace, and anyway the stuff I've got hold of in recent years (so-called "skunk") is not the same as what we had in the 1990s and early 2000s, and for me less helpful alas.
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You can't be proud of being Neurodivergent, because it isn't something you've done: you can only be proud of not being ashamed. (paraphrasing Quentin Crisp)