An interpersonal relationship is a strong, deep, or close association or acquaintance between two or more people that may range in duration from brief to enduring.This association may be based on inference, love, solidarity, regular business interactions, or some other type of social commitment.
Fisher defines love as composed of three stages, attraction, romantic love, and attachment.
Cohabiting relationships continue to rise, with many partners considering cohabitation to be nearly as serious as, or a substitute for, marriage.
LGBT, on the other hand, face unique challenges in establishing and maintaining intimate relationships.
Most psychologists and relationship counselors predict a decline of intimacy and passion over time, replaced by a greater emphasis on companionate love (differing from adolescent companionate love in the caring, committed, and partner-focused qualities).
However, couple studies have found no decline in intimacy nor in the importance of sex, intimacy, and passionate love to those in longer or later-life relationships.