You have okay options to play an ace/aro character, you have options to form close bonds with most of your companions without sex for sure. (Was pleasantly surprised that as horny as Karlach is, you have very clear options to set boundaries there and still have that relationship. ) And of course, you don't have to romance anyone, but can still raise their approval and earn their trust/friendship.

Admittedly though, there isn't really any representation from non-player characters, which is unfortunate.