You can have a story about love and love not triumph. I'd definitely say that that was a big element of the book. But I'd also include the class struggle and the so called dressing. Calling the setting a dressing seems a bit of an underplay. Settings are really important and generally also hold a message. But then again, I'm confused about why there's so much discussion about "I thought it was about" and not "this element is what struck me". Because 1984 is about ALL of those things.