homance (n): the intensely strong bond between two girls. If one was a boy, they would be dating. Signs of a homance often include squealing, hugging, inside jokes, strange coincidences, a secret language, bruises from affectionate actions, behavior seeming odd to anyone outside the homance, and having to explain that neither one of these girls are a lesbian.
Guy 1: Dude, why did those two girls just look at each other and scream and run across the hallway into each other's arms?
Guy 2: Oh them? Don't worry about it, they have a homance <3.