NicoF is right. Björn wrote the chorus and Gustaf the verse after Gustaf'd moved from Borlänge to Falun and was about to quit the band because he thought he didn't like the other band members anymore. When Gustaf heard Björn's lyrics (the chorus), which was his version of their fight, he wrote the verse, and they got back together. There's also another version on BGD with different lyrics.
NicoF is right. Björn wrote the chorus and Gustaf the verse after Gustaf'd moved from Borlänge to Falun and was about to quit the band because he thought he didn't like the other band members anymore. When Gustaf heard Björn's lyrics (the chorus), which was his version of their fight, he wrote the verse, and they got back together. There's also another version on BGD with different lyrics.