I mean, I made my first run without any romance. I disliked every single companion. And still have issues with most of them after more playthroughs. It's not hard, to begin with, they do not flirt openly with you unless you seek dialogues for that. Seriously, they flirt with each other in banters way more than with the player.
The only moment they seem actually interested without any real searching through the dialogues is at the party. But then that seems more a weird thing than what was promised in interviews I've read. But is easy to just not talk with them and go to sleep, problem solved.
