<P> Gnash enlisted San Francisco singer - songwriter Olivia O'Brien with the help of Angel Benitez , who originally wrote the song , to provide the vocals for the track . O'Brien had already worked with Gnash , having covered his song `` Disposable '' . Gnash originally released the song on July 26 , 2015 , on his SoundCloud page . It was released commercially on iTunes on February 17 , 2016 , becoming the lead single of Gnash 's extended play , Us ( 2016 ) . </P>
who wrote the song i hate you i love you
Angel Benitez