Funny thing, the part in the Citadel is the same, romance or not.
Also, just beated the game. Yeah the ending was bad, confusing and didnt make a lot sense, but its nowhere as close to "franchise ruining! omg! i wont play any of the 3 ME games ever again, fuck you bioware!" as some people say, but that's the typical overreaction on the internet i suppose.
Also why was Garrus on the Normandy when he was with me when we ran for the Citadel beam? No way he had time to get back there! And it sucked seeing Shepard, MY Shepard, having no choice but to kill herself, but whatever... i guess they had to do that to close the trilogy and never bring Shepard back in future ME games.
But still, even if the last 10 mins were the worst part of ME3, i still enjoyed the hell out of it. Can't wait to do other playthroughs and see the differences.