Gatsby loves her

Jay shouldn't expect the same love that he is giving to Daisy, from her. Event after 5 years, Daisy didn't changed, her morals and thoughts about marriage didn't change. The reason why she kept seeing Jay is, she wasn't happy with her life, her heart was empty and she wanted to satisfy her boredom.

Gatsby really loved her and he believed Daisy loved him too. Gatsby was a very hopeful man who ended up with disappointment.