The human psyche is mean sometimes. The more you try to consciously forget someone, the more lasting the person will be in your memory. Pity. Always on your mind.
You heard a beautiful recording of Elvis Presley with The Royal Philharmonic Orchestra. Elvis released the song "Always On My Mind" in 1972 on the occasion of the separation from his wife Priscilla. The original title was sung by Brenda Lee in 1971.