Lyric discussion by Ravencross 

Cover art for Girl Crush lyrics by Little Big Town

Looking through the lyrics there's only one place, "I want to taste her lips Yeah, 'cause they taste like you", where the singer even eludes to wanting to be with the other girl and this was only b/c she tasted like the man in question. Overall this is a story of a girl who's jealous of / longing to take the place of the girl in the relationship she's watching from the outside in.

My Interpretation