Relationships often develop and evolve through distinct stages. While experiences may vary, the common stages include: 1) The Euphoric stage, characterized by excitement and infatuation; 2) The Early Attachment stage, trust and commitment deepen; 3) The Crisis stage, where couples start to drift apart; and 4) The Deep Attachment Stage, marked by a sense of true partnership and mutual growth. Understanding these stages can help navigate the ups and downs of a relationship.