The reality is that a 3-year anniversary is a significant milestone in a marriage. With that stated, your marriage represents both couples feeling comfortable and having a home, as well as someone looking out for their best interests at all times. If a newlywed couple experiences disenchantment during the first year of marriage, it is a warning of problems. Couples who were still happily married were able to have favorable thoughts about their spouses throughout this early stage of their relationship. 3.