"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 original lyrics by Dolores Duran.
[1] 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.
'"[2] 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).
[3] In 1960, she recorded the first version in French as "Gardez Moi Pour Toujours.