Daisy is unquestionably the prig of the novel, being the high-class rich girl. She is, as most of the characters in The Great Gatsby, in love with money. She couldn’t leave money for ‘real’ love, which was obvious in her breakdown before her marriage to Tom Buchanan when she was trying to decide between Jay Gatsby and Tom. Her decision to marry Tom proved that her true love is money instead of (then) poor Gatsby with a low social status. But when Gatsby all of a sudden came back into Daisy’s life, having made a huge amount of money and reached the upper class, she thought her decision to marry Tom had been a mistake, since she could have married even richer man than him. That man had missed her for five long years, which Daisy had some difficulties to understand. She was an impatient character and couldn’t believe that anyone could wait for anything as long as five years.
Tom and Daisy were both young, good-looking, wealthy high-class people. They did have love in their marriage - love of money. And since their marriage was superficial, it wasn’t actually a surprise that they both committed adultery, Daisy with Gatsby and Tom with Myrtle Wilson.
The reason why Tom did have an affair with Myrtle was seemingly because she was a middle class woman (as contradictory as it may sound since Tom obviously didn’t worry about anyone but himself). He never loved Myrtle, but she was some kind of ‘pet’ to him (might be symbolised by the dog leash Tom bought to her), and apparently the appreciation Myrtle gave him because of his social status pleased him.
Myrtle gained a sense of being in the upper class by having the affair with Tom. She even looked down to her husband George, claiming to be too good for him. “I married him because I thought he was a gentleman,” she said finally. “I thought he knew something about breeding, but he wasn’t fit to lick my shoe.” (Myrtle on George.)
Anyway Myrtle’s love for Tom was doomed for failure from the very beginning due to her standing in a lower class than Tom.
In my opinion, the only genuine love described in The Great Gatsby is George Wilson’s love for her wife Myrtle. He had money enough to get along, but it didn’t matter so much for him. He was happy to live with her wife in the valley of ashes, but sadly didn’t get the response for his love he would have deserved.
None of the relationships described in the novel represent true love. Marriages are artificial or done on the spur of the moment, and “love” is usually love of money or idealisation of high social status. And how could any relationship be true and binding, if values are corrupt or feelings aren’t mutual?
Love indeed is blind, even corrupt love.