I don't need him to be romanceable.
How dare you?!
Such delightfull company for my evil sadistic mistress!
I'm not against any character to be romanceable and seeing how many people would like to see an Abdirak romance (there are some YouTube videos about that topic too), I bet he will be romanceable, should he become a companion. I'm just indifferent to it. I'm not sure, how a romance with a priest of Loviatar will look like though. After all, it's not really the bdsm as we know it (I think Niara mentioned, that this is more Sharess domain), it's more about the pain and less about the fun...
