I dunno if I'd really qualify it as asexual if you're still interested in sex/sexual stuff, but just not in the regular old vanilla variety. Asexuality mostly applies to people who generally have no sexual drive and/or interest at all, doesn't it?
Another question is whether or not you feel bad about a lack of interest in "regular" sex. If you do, it might be worth looking into medical/physical reasons which might cause a lack or loss of interest - while there's nothing wrong with being ace, there's also nothing wrong with actually wanting to be sexual but not feeling it, and there are possible reasons why a sex drive might be low or non-existent.
Anyway, sexual drive and desires are different for each person, and as long as it doesn't involve parties that can't/don't consent, you should never feel guilty or bad about whatever your personal spot is or what label you like to put on it.