Why does Nick Carraway break up with Jordan Baker?

In the novel, Jordan is very observant and cynical. She's also quite the hypocritical liar. Jordan doesn't like to hold onto past experiences and mistakes, which relieves Nick and forms a loose-bond between them. However, Jordan's lack of morals and inability to take accountability for her own actions is what repulses Nick, who in turn dumps her. In the end, she reveals that she is even more careless than Daisy, and unlike Daisy, has no remorse for the people she hurts. She even goes as far as to gloat about playing with Nick's heart, revealing that she never truly cared about him.