The song "You're Gonna Need Me" by UB40 is about a person who was in a relationship with someone who left them for a new partner. The lyrics depict how the person who left is now living a happy and free life in their newfound single world, while the whole town is talking about them. However, the singer believes that eventually, the person who left will realize that they made a mistake and will come to need them again. The lyrics suggest that the person will soon come to regret their decision and will long for the singer's love and support. The singer warns that when the person eventually decides to leave their new partner and return, they shouldn't expect to be welcomed back with open arms, especially if they come back with tears in their eyes. The singer reminds them that they had a good lover once, but they didn't appreciate or recognize it at the time. Overall, "You're Gonna Need Me" is a song about an ex-lover expressing their belief that their former partner will come to realize their value and need them again, despite their current happiness in a new relationship.