More than bestfriend

What do bestfriend do with each other? Do they hug? Do they cuddle? Do they have feelings for each other? It seems like Tay and New misused the word bestfriend because they don't really know what do bestfriend do.

PITBABE (English)

Charlie wants to be a racecar driver but he doesn't have a racecar of his own. The only solution he comes up with is to make a bizarre agreement with king of the raceway Babe, nicknamed Pit Babe. Even stranger, Babe agrees to help Charlie realise his dream. (Credit- @Summ3r_Dawn)