why does nick choose to share his thoughts and feelings with jordan?

Both Jordan and Nick are outsiders. Both characters seem disconnected from the filthy rich lives of the other characters. Although they indulge in some of the lavishness around them, they both share a connection with the outside world: the world of people who are not entitled to an endless supply of money. There is a sense of the rational behind their conversations that is not present with the obscenely rich of East Egg. Jordan a detached element to her that Nick shares.