An Asexual Journey

So as a 15 year old with supposed "hormones" I don't feel sexually excited or anything of the sort. I instead mostly prefer to cuddle and kiss but the idea of the "nasty naps" just doesn't appeal in my mind. I've never pleasured myself or anyone else pleasure me due to the fact that I don't feel the need to.  Currently dating someone in the same age group as I am, I often feel distressed knowing that I would have to say to my partner that I don't want to do the "mattress dance". And would in turn hurt the person that I am with. What should I do?