Elementsofsurprise
I could have written most of your original post! Apart from the ASD part, though I have been asked a few times in my life whether I had it, through misreading social signals or being too blunt :)
I would definitely have said that after the age of 10, I felt that it was much easier for me to be around boys, that I could be myself, while most girls completely blanked me if I was myself. My only friends after that age at school were "geeky" girls, friends in the sense that I was comfortable enough with them, but they weren't friends who I'd miss desperately if they disappeared from my life.
I feel that very often when women (including on this thread) say "I get on better with men" they mean "I usually don't feel welcomed by women, even though I would love to be". I did make some amazing women friends - one(7 years older)who was a force of nature who embraced me in spite of my social reticence around women, and then a group of sisters from one amazing family, who were all extremely talented, intelligent and interesting, 3 of the older sisters each became my friends individually and as a group. After that it was all uphill, in that I met even more interesting and amazing women, and also made conscious effort to come out of my shell more around women (what I usually only felt comfortable doing around men). But then I followed my English husband from my country and moved to England at the age of 29 and left my established group of friends behind.
Here I felt alwats very welcomed on a superficial level, plenty of acquaintances, plenty of girls to have small talk with (which I find hard work and which makes me miserable if there's too much of it). I found that if I make an effort myself, I'm never blanked, women are always happy to chat, but to find a true friend is probably as difficult as to find a partner for life. The two friendships where we clicked were amazing, but one of them was an American girl who was only here for 18 months, and the other semi-local(Scottish expat to England) who also eventually moved to another country for a couple of years, and since she returned the dynamics of the relationship changed and I've barely seen her.
I haven't met anyone else who I clicked with as well, and I find having my male friends from my past life (communicating through email/chat mostly) is enough of male friendship, I also keep in touch as much as I can with my original girlfriends, but what i miss is having a group of proper female friends who I could trust completely and also have a laugh with. I think there are some groups willing to accept me if I made an effort, but they are not inspiring enough for me to bother.
Though I do have two-three who are definitely more meaningful to me than acquaintances, one of them is from my country of origin, but then I don't have chemistry with them iykwim.
I think we need to create a club for women who want to have more women friends in their life but feel like it's an impossible dream
maybe some of us are local to each other?