That would be my anti-romance. I want to see the relationship developing and be much more interesting than "I love you, let's sleep together," plus romantic epilogue. In this cases, I generally just chose not to say "I love you" and sleep with the character, and that's what I did with Casavir, because it was simply uninteresting.
I love a romance to be a mini-game - not a very tough one, mind, but a mini-game where everything about your character affects which way the relationship goes - towards friendship, or towards love. And, of course, I want player to have a reasonable degree of control over fixing screw-ups via the Player-initiated options.
But that's just me. I just love to have the romantic element in my games, along with the friendship element. I want to have my heroines to have a sweeping love stories to match the tale of their heroic endeavours on the Main Story Line front.