Think about what you're assuming here. From what you say, it's clear you think that a woman, on meeting a man for the first time, scans him for boyfriend suitability and then either a) expresses sexual interest, b) tells him to fuck off or c) puts him in the friendzone. For the vast majority of women, this is not the case.

I do not know what goes on between women and other men that aren't me that causes relationships to occur. I have a theory that their faces peel back, revealing pheremone-dispensing glans that they use to communicate and determine mutual suitability.

These friends of yours were not obliged to think of you sexually or consider you as a boyfriend or anything else. But because you didn't get what you want you turned bitter towards them. They wanted a friend, you wanted sex or nothing. Who's missing out?

By then, I had already largely adapted to a solitary existence. I suppose I wasn't even really friend material, much less boyfriend material. Trying to get close to them was a final attempt to get what I desperately wanted and that seemed to come so easily to most other men. It was only possible because I had finished mentally downloading a way of interacting with women that didn't end in complete indifference or outright humiliation. Only my sheer intellectual horsepower narrowly compensated for my lack of natural human affect and spontaneity, and I could actually pass for a normal person somewhat, and not a Ted Kaczyinski understudy who went days without speaking to people and built strange contraptions alone in the woods. I understand that nobody was obliged to preserve my lingering illusion that there was any semblance of fairness in the world and that I was not an alien abandoned here for unknown purposes, but it certainly would have been nice. Might have prevented me from becoming what I am today.

What this all tells me is that you yourself only consider women as potential sexual partners and nothing else. There are women that do the same, fine, but I take exception with the motives you dump on the rest of us.

That is true now, but it wasn't back then. I have survived just fine without anything remotely resembling relationships of any kind, including casual friendships with members of the same sex, literally no social life at all, since the moment I graduated high school, so it is accurate to say that I fail to see any use for women other than sex now. It amuses me how highly women value relationships, social connections, and emotional intimacy, because I barely even remember what any of these things are, and I know that no woman could ever survive living in my head and having my life. She would commit suicide in less than three days.