See the link below to an article discussing Cohabitation Agreements.
“As an increasing number of couples agree to live together rather than marry, attorneys are seeing more and more cases involving break-ups leading to the courtroom. According to a recent survey of the American Academy of Matrimonial Lawyers (AAML), 45% of the members find that legal disputes between unmarried couples who had previously lived together have been on the rise during the past three years. In all, 26% have cited an increase in cohabitation agreement requests from unmarried couples.”
Source: Avoiding a Costly Cohabitation Divorce, By Joslin Davis, The Blog, updated 6/3/17