making pansexual is the correct approach. hated many games that i'm forced to romance xxx and need to be either male or female. its a win-win. why do you feel exclusive that this character in game should and must be exclusive to only your gender? you get to romance her/him anyway. just care less about what are the companions sexuality.
Technically you are not forced to romance anyone. Playersexuality cheapens the npcs as you can never reference their orientation and sexuality in their story.