Yeah that's my biggest criticism of the companions as well. Some of my favorites from Mass Effect and Dragon Age were not those I romanced, but those I befriended.
Garrus and Mordin, for example.
Ironically, the 'romance' I am enjoying the most in BG3 has been the one with
because we actually get to slowly figure out who he is/was. I legit know more things and I have a much clearer idea or what to expect from him than I do for Gale.
I think that adding a tiny heart icon to mark romantic interactions wouldn't hurt one bit.