In an effort to leave you with a bit more than a downvote I’ll drop you this Text: https://redsails.org/artisanal-intelligence/

I wouldn’t say uncommon in general but the closest friendships are usually between people of the same gender. In my experience, there’s a point of “closeness” in a cross-gender friendship where society and your peers will expect you to move on from being friends and become a couple. Especially for asexuals this can be quite overwhelming and lead to a distancing from the other person.