"All Of My Life" is a blues song by John Mayall & The Bluesbreakers that explores themes of unrequited love and heartbreak. The lyrics express the protagonist's longing for someone who they have always wanted, but who doesn't feel the same way. Despite their efforts to get along with this person, they find themselves lying and crying for them without any reciprocation. The song's chorus speaks to the protagonist's desperation and inability to move on from this unrequited love. The somber and melancholic tone of the song is reflected in the slow, bluesy instrumentation, with Mayall's harmonica adding a mournful element to the mix. Overall, "All Of My Life" is a heart-wrenching meditation on the pain of wanting someone who can never truly be yours.