A committed relationship is an interpersonal relationship based upon a mutually agreed-upon commitment to one another involving love, trust, honesty, openness, or some other behavior. Forms of committed relationships include close friendship, long-term relationships, engagement, marriage, and civil unions.
- monogamy: having a single long-term sexual partner
- marriage: a legal and social binding between two people.
- sexual infidelity: having a sexual relationship without a commitment to have no other sexual partners
- sexual fidelity: not having other sexual partners other than one's committed partner, even temporarily
- serial monogamy: having a series of monogamous relationships, one after the other
- open relationship: a commitment to a partner without excluding other romantic or sexual involvement
- polygamy: having multiple long-term sexual partners
- polyandry: having multiple long-term male sexual partners
- polygyny: having multiple long-term female sexual partners
- polyamory: encompasses a wide range of relationships; polyamorous relationships may include both committed and casual relationships
- promiscuity: having casual sexual partners at will (compare with chastity)
- relationship anarchy: having relationships that develop as an agreement between those involved, rather than according to predetermined rules or norms.
- Haviland, William A.; Prins, Harald E.L.; McBride, Bunny; Walrath, Dana (2011). Cultural Anthropology: The Human Challenge (13th ed.). Cengage Learning. ISBN 978-0495811787.