Me too 
Yesterday all night thinking whom to choose for the first game - a man or a woman. My brain is going to explode soon. I like to play female characters, but Dorian!.. 
Play the dude and get the stache? Or you play as you wanted with a female Inquisitor?
This situation kinda evokes something similar for a lot of gays and lesbians who play story-based video games...
I don't mean to be very cheeky, but seriously, though, can I give you an honest opinion?
They said romances were very focused on, sure, but they assured us that it's not the be-all-end-all for character relationships.
This is deciding for your first headcanon playthrough, right? Go with what you want to play with, not because of who you'd like your Inquisitor to romance. I mean, I'd like to romance Blackwall with my Inquisitor, but if I'm rolling up a female Inquisitor just for it? Yeah, not happening, because there should be more to a playthrough than that. So you can still play as a female Inquisitor like you always wanted, and you can still form a really close friendship with Dorian- it won't be romantic, but character friendships are still a thing.
So, your Inquisitor being best friends with Dorian is still a thing you can totally do if you really feel it in your heart of hearts to play a female character. Yeah?