im also writing a fantasy romance, and i think its like... one of those really difficult ones where fantasy can feel more about settling, romance more about story. a romance can be anywhere, a fantasy about anything. so its so easy to be both.
but does your story appeal to fantasy fans? while any story can be in a fantasy setting, a fantasy story is typically quest-driven escapism. theres more action than a romance might have, more focus on things other than a single character dynamic.
romance can be multifaceted with a complex plot and all the rest, but the key driving feature is the romance. how important is that to you? to your story? to your readers?
for some examples... the hunger games has a romance at its core, but its still sidelined by / integrated into the wider plot - whereas the fault in our stars may tackle some heavy subject matter, but is really just about these two kids getting it on. one is dystopian sci-fantasy(???) with a romantic subplot, the other is romance with a real-world-drama framing device.
or look at any action movie - theres a girl, who the guy gets. theyre still action, rather than rom com, because the focus isnt on the development of the couples characters and relationship, but about getting the gold and saving the day. plot vs subplot.
also, you can totally just flip flop - i started by categorising my comic as fantasy, flipped to romance with a change of season and saw a little boost in followers. if the focus moves away from the romance and onto the plot for a while, i might flip back to a fantasy category and see how it goes.