Answer
After all Gatsby won Daisy's heart, and they made love before Gatsby left to fight in the war. But Daisy made a promise to wait for Gatsby, but in 1919 she chose instead to marry Tom Buchanan, a young man from a solid, aristocratic family who could promise her a wealthy lifestyle and who had the support of her parents. Wilson goes to Gatsby's house, where he finds Gatsby lying on an air mattress in the pool, floating in the water and looking up at the sky. Wilson shoots Gatsby, killing him instantly, then shoots himself. Nick hurries back to West Egg and finds Gatsby floating dead in his pool.