Gatsby's Dream Is Just a Dream
Gatsby was a poor kid who was caught up in love and the American dream. He had everything he wanted except one thing, Daisy, his true love. What preyed on Gatsby was the addicting love of Daisy which caused him to be obsessed with reliving past events in his own way by making his dream come true, which can not happen, which is also "the foul dust that floated in the wake of his dream." This is the bitter truth Gatsby cannot swallow as he tries to move forward with his plan, like the wake of a boat as it goes forward. Nick was Daisy's cousin who so happened to be caught up in all this "randomly." He moved to West Egg and found a house right next to Gatsby within Nick's budget. Nick closed his interest in him feeling sorry for Gatsby was short-winded meaning it came to a quick end like Gatsby's dream, while Gatsby is too stubborn and love-struck to realize his dream will never come true as Nick gets fed up with Gatsby's Schemes.
Gatsby did everything he did to become wealthy and accepted into a higher society in
some not-so-legal ways, all for one thing, Daisy. His entire world revolved around her and this idea of being reunited with Daisy and living happily ever after. This is not the only thing that preyed on Gatsby, He didn't just want to relive the past but reconstruct it as if he had a "do-over". The issue with his dream in itself; it is a dream and only a dream. Meaning it is a fantasy that Gatsby keeps playing in his mind over and over again while staring out at a green light across the bay which happens to also be Daisy's and her husband's, Tom, house. In the book, Gatsby seems to Patel 2 stare at this green blinking light at night. Gatsby's love was so strong he built a colossal mansion across from Daisy's house and hosted massive parties with open invites hoping she would walk in one day and he would run into her. At one point in the book when things start to go downhill for Gatsby and the green light disappears. This can be interpreted as Gatsby's dream having no chance of coming true. Therefore the bitter truth that Gatsby could not swallow was also the reason he was killed, love, and a dream.
Nick closed out his "interest in the abortive sorrows and short-winded elations of men".
This means he was done putting up with Gatsby and being part of his schemes...