http://guestrelationshipsblog.com/2014/07/the-five-stages-of-a-relationship-what-stage-are-you-in/

Relationships form a vital part of human existence. Stages in a relationship are characterized by a recognizable pattern whose mastery leads to a successful and fulfilling partnership. There are several distinctive phases in a romantic relationship, with each stage having distinctive attributes. Knowledge of these properties makes the individuals in the relationship aware of the stage they are in and hence enabling them to skillfully conduct the relationship at the pace they feel comfortable with.