"Don't Ever Go Away (Por Causa de Você)" aka "Por Causa de Você (Because of You)" is a bossa nova song composed in 1957 by Antônio Carlos Jobim, with lyrics by Dolores Duran. English lyrics were later added by Ray Gilbert.
Bossa nova historian Ruy Castro relates a story of how Jobim and Duran wrote the song: "The two of them had met by chance at Rádio Nacional, and Jobim had shown her the song, which didn't yet have any lyrics--Vinícius de Moraes was supposed to be taking care of that. When Dolores heard the music, she took her eyebrow pencil out of her pocket, rapidly scribbled a few lines on a paper napkin, and showed them to Jobim. He liked them and sighed: 'What do you think this music would sound like with Sinatra?'"
As it turned out, Frank Sinatra recorded the song with Jobim in 1969, under the title "Don't Ever Go Away (Por Causa de Você), which appeared on his album Sinatra & Company (1971).
The first recording of the song was in 1957 by Sylvia Telles.