Building up just a solid friendship with almost every single one of your companions should be the DEFAULT state unless romance is actively chased by the player.
This as a guideline would make the game much more comfortable to play and relationships between characters much more believable. The player should have the initiative in romance rather than being forced to turn down horny companions left and right.
I wouldn't mind something clumsy like [ROMANCE] tags either for dialogue if having a drink after battle equals romantic interest or having to turn down a quick romp with an alien species in BG3.
