"Y.O.U." by Grand Funk Railroad is a song about a failed relationship and the pain that comes with it. The lyrics express the protagonist's realization that their partner was not true to their promises of love. Despite initially believing in the sincerity of their partner's affections, they eventually discover that they were deceived. The chorus repeats the line "I been thinking of you babe, thinking of y-o-u," emphasizing that even though the relationship ended, the protagonist still finds themselves thinking about their former partner. This suggests that the emotions and memories associated with the failed relationship still linger. The verses delve into the specific ways the partner has hurt and disappointed the protagonist. The lyrics mention the partner's actions that are considered deceitful and hurtful, implying that the betrayal goes beyond just emotional pain. Despite the hurt, the protagonist decides to let go of the relationship because they recognize that staying would only prolong their suffering. Overall, "Y.O.U." conveys the sorrow and introspection that arise from the end of a relationship, as well as the struggle to let go of someone who has caused pain.