In Jordan's description of daisy's Louisville background, what indications are given that show that Daisy really did love jay Gatsby?

During Nick's next encounter with Jordan Baker, she finally tells him her remarkable news: Gatsby is in love with Daisy Buchanan. Back in 1917, when Daisy was eighteen and Jordan sixteen, the two had been volunteers with the Red Cross. Though all the officers at the military base had courted Daisy, she fell passionately in love with a young lieutenant named Jay Gatsby. Though she had promised to wait for Gatsby's return, she accepted Tom Buchanan's proposal of marriage while Gatsby was still away at war. The night before her wedding, Daisy suddenly realized the enormity of her mistake; she became hysterical and drank herself into a stupor.