Asexual or not?

I've been so confused lately, I'm a virgin, never have been even close to having sex. I do get horny and turned on by watching porn and reading erotica but whenever I'm in a relationship I can't even think about having sex. Do you think I'm just not ready and haven't found the right one, or could I be asexual? I have had no desire to have sex with anyone I've been with even if I really liked them! Could I just have low sex drive? Please comment what you think!