The song "How Could I Leave" by UB40 is about the fear of losing someone you love and the desperation to keep them in your life. The lyrics express the deep connection and dependency the singer has on their partner, comparing it to a rose that needs constant care to survive. The song talks about the promise of not leaving or hurting each other and the uncertainty and distress the singer would feel if their partner were to leave. The phrase "It was ordained that man should leave his mother and cling to the woman that he loves" suggests that it is natural for a man to leave his family and commit himself to the woman he loves, emphasizing the importance of their relationship. The singer expresses their devotion and declares that they could never love anyone the way they love their partner. The repetitive "Wow ho ho yeah yeah" and "Wow ho now now" serve as vocal ad-libs, adding emotion and intensity to the song. Overall, "How Could I Leave" reflects the fear of losing someone and the desire to hold onto a loving relationship. It conveys the insecurities and vulnerability that can arise when deeply connected to another person.