platonic
adj.adj. describing a close relationship between two people that is friendly and loving but does not involve sex.
adj. characterised by a close relationship that is spiritual or intellectual rather than physical or sexual. Often used to distinguish deep friendships from romantic or sexual partnerships.
They have a strictly platonic relationship.
After their brief attempt at dating, they realized they were much better suited to a platonic friendship.
The film explores the nuances of a lifelong platonic bond, challenging the cultural assumption that a deep emotional intimacy must eventually lead to a romantic encounter.
From Latin Platōnicus. By surface analysis, Platon (“Plato”) + -ic (“relating to”).
When referring to relationships, it is usually written with a lowercase 'p'; when referring to the philosophy of Plato, it is capitalised.