The Beatles tune 'PSI LOVE You' is a song written by Paul McCartney and released in 1967. It was featured on the album Sgt. Pepper's Lonely Hearts Club Band and is one of the most popular songs from the band. The song is about a man who is trying to express his LOVE for someone, despite the fact that they are no longer together. The title of the song is derived from the three-letter Greek letter 'psi, ' which stands for 'LOVE.'