Hey again, J.D., good to see you on the boards.
Generally, when people identify as asexual, the biggest factor is that they don't feel any desire to be sexual with a partner. Where that can get tricky is figuring out what's sexual. Intercourse usually is for people, obviously, but then, so is kissing. At the same time, that really depends on the kind of kiss/kissing: some kisses are about sexual feelings, as are some desires to kiss people. Other times, kisses and the desire to kiss can just be about platonic affection.
Too, it's not uncommon for people who are 15 to not feel interested in ways of being sexual like intercourse, especially if they aren't even close to someone else in other ways, physically or emotionally. Some people can feel desire for sexual activities abstractly, others just really don't, and only do when they are actually already with or really getting close to someone.
From the sounds of things, this might just be something where you don't have enough information about yourself yet to know the answer to this question, so your answer for now may just be, "I don't know."
How do you feel about all or any of that feedback?