Ace isn't a thing. Aro isn't a thing. Yuuri is probably autistic spectrum.
If you have no sex drive (for lack of a better term, because it also is biologically connected to romantic love) during or post puberty until menopause or death (depending on which sex hormones are dominant), you have a medical problem. Sex drive is as natural and important as the desire for food. If you don't have any sexual desire, I would recommend seeking medical help. Perhaps you are depressed, or traumatised, or have endocrine problems. Perhaps you are unable to recognise, or are afraid, or ashamed of having, sexual desire. Perhaps you have sex-related anxiety and this is you coping mechanism. Perhaps you are uncomfortable with your own sexuality, or your body.
Whichever or none of these that might apply, seek medical help. It is not healthy not to have sexual desire. Sexual desire is an intrinsic part of the human experience that should not be denied. Not recognising it as a problem will cause health and interpersonal problems down the road, in addition to whatever has caused your lack of desire in the first place.