Tav: Are you not attracted to me? Is that it?
Astarion: Of course I am - look at you! You're a vision. And you're so much more than that. ...I don't know what to think. I don't know what I want.
Another version of the dialog:
Tav: Were you even attracted to me? Or was it all a lie?
Astarion: Of course I was attracted to you. Look at you, for goodness' sake!
Yes, and during the passage it just felt like Tav was attracted to Astarion physically, that it was a pleasure for him, even though he's closed off emotionally, periodically "repulsed" and "prickly", he likes what they're doing. What would one think looking at his anguished face the moment he proposes sex? It doesn't fit the script at all.
