I'm late to the party, but sexual and romantic attraction can be different. Some aces desire a romantic relationship. So you can be, for example, an asexual demiromantic or asexual panromantic.

If someone doesn't experience sexual or romantic desire, they're an aromantic asexual, or aro-ace, or on the aro-ace spectrum. I'm aro-ace.

I recommend checking out asexuality.org if you haven't already, as many people there struggle with this exact issue!