I've always considered myself asexual-until-proven-sexual, rather than sexual-until-proven-asexual. Genitalia repulses me, so I can't ever see myself ever engaging in anything of a sexual nature!
How did you realise you were asexual? Did you see a doctor?
As I said earlier, asexual-until-proven-sexual. I've turned down sexual advances because I really have no interest in sex whatsoever- seems like a waste of time to me! There are better pleasures in life.
Sometimes (usually out of boredom, lol). I could go without masturbation indefinitely though.
My best friend is asexual too. How can I support her in general?
Just stick up for her in the normal friendship way- if anyone tries to invalidate her identity, or make unwanted advances, etc. Tbh, you'd be better off asking her- only she can answer that in full.
Do you literally have no sexual feelings at all? Or do you just not have any sexual feelings towards other people?
Also, do you consider yourself to have a romantic orientation?
I can only get turned on through manual self-stimulation. Fantasising and porn? Instant turn-offs. I've never just randomly felt desire- in fact, I don't even feel desire when masturbating.
Yes- panromantic, and romantic relationships are entirely normal, just minus the sex.