Daisy was not overly impressed by Gatsby's wealth. She came from a wealthy family and was married to a man who was at least as wealthy as Gatsby. Fitzgerald gave her the name Daisy to suggest that she was like a rather dainty and pretty flower but lacking any depth of character. She seems to be more moved by Gatsby's passion and adoration for her than by any terribly strong feelings for him. She seems like a sort of "trophy" over which two strong men are fighting. She probably gets involved in an adulterous affair with Gatsby mainly because her husband Tom is having an affair of his own--and not the first one. She thinks she is entitled to love, and if she can't get it from Tom she will get it from someone else. Fitzgerald never succeeds in making the reader feel that there is a strong bond of love between Daisy and Gatsby. This may possibly be because authors and publishers in the 1920s could not have scenes in fiction that involved explicit descriptions of intimate relations. Tom Buchanan seems like such a violent man that it is a wonder he seems to accept what he is sure is going on between Daisy and Gatsby in such a "modern" and "civilized" fashion. There is a strong feeling throughout the novel that Gatsby overvalues Daisy because of what she symbolizes rather than for what she really is--a small, ordinary, common, fragile, fast-fading little flower.
I beleive that Gatsby and Daisy loved each other for what they both represented to each other. To Gatsby, Daisy represented beauty, glamour, and excitement. All of which he had longed for out of life. To Daisy, Gatsby came to represent wealth and the material things of the world that she loved so much.