Let's not beat around the bush. This deep cut was made popular on the television show Parks and Recreation. It was one of Ron Swanson's favorite songs and appears twice during the series.
A tribute to the value of a good friend and how they can help with the pain of a heartbreak, Willie Nelson wrote it for his 1986 album, Good Times. The whole album was meant to be a departure from the Nashville sound that had pigeonholed him for the first decade of his career. In that respect, it was a success - Nelson became a superstar.