I still think/hope something got mixed up in his romanced dialogue at the party in general. You can for example always tell Minsc that you and Astarion are looking for a cure for him, no matter if you chose the ending specific to finding a way to walk in the sun or not. Otoh if you chose the "we should settle down" path, this does not get reflected by the narration at all.
As for bite night. It is weirdly hilarious that if you play as the nuke, you do get to make fun of him a little if he insists on drinking from you despite already knowing about the orb and warning him off, but you still have the option to let him nibble from you in nights to come. Especially since when discussing the vintages of the party members later on, the dialogue was modified and instead of confessing the PC was his first, he is salty and once again complains about how Gale's taste has put him off of his blood.
