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He wanted nothing less of Daisy than that she should go to Tom and say: "I never loved you." After she had obliterated four years with that sentence they could decide upon the more practical measures to be taken. One of them was that, after she was free, they were to go back to Louisville and be married from her house—just as if it were five years ago. (6.125)
Gatsby actually wants Daisy to erase the past, like in some sort of mediocre sci-fi movie. Sorry: this is real life, and it can't be done. Everyone has to live with the consequences of their past, whether they want to or not.
Across the courtesy bay the white palaces of fashionable East Egg glittered along the water, and the history of the summer really begins on the evening I drove over there to have dinner with the Tom Buchanans. Daisy was my second cousin once removed, and I'd known Tom in college. And just after the war I spent two days with them in Chicago. (1.15)
Oh, fun. Notice how Nick doesn't even say "the Buchanans," just the "Tom Buchanans"? This is evidence that the girl Gatsby was in love with—Daisy—no longer exists.
The only completely stationary object in the room was an enormous couch on which two young women were buoyed up as though upon an anchored balloon. They were both in white, and their dresses were rippling and fluttering as if they had just been blown back in after a short flight around the house. I must have stood for a few moments listening to the whip and snap of the curtains and the groan of a picture on the wall. Then there was a boom as Tom Buchanan shut the rear windows and the caught wind died out about the room, and the curtains and the rugs and the two young women ballooned slowly to the floor. (1.27)
Ah, the sweet smell of foreshadowing. Here, Tom literally—or is it metaphorically?—deflates the women, just like (SPOILER) he's going to do later on.