passionate friendships

Passionate friendships are intense, emotionally intimate bonds between friends that carry the fervor usually associated with romantic love—without necessarily being sexual or romantic.

The term often describes historical relationships, particularly between women in the 18th and 19th centuries, when such ardent devotion between friends was socially acceptable: Their passionate friendship lasted decades, filled with letters declaring undying love.

Today it captures friendships that transcend casual companionship—marked by deep attachment, physical affection, and emotional vulnerability that blurs the line between friendship and romance.