Platonic love
noun
Platonism.
love of the Idea of beauty, seen as terminating an evolution from the desire for an individual and the love of physical beauty to the love and contemplation of spiritual or ideal beauty.
(usually lowercase)
an intimate companionship or relationship, especially between two persons of the opposite sex, that is characterized by the absence of sexual involvement; a spiritual affection.
Origin of Platonic love
First recorded in 1635–45