The song "Oxygen" by Jesse McCartney is about the feeling of dependence and love for someone. The lyrics convey the idea that the person the singer is addressing is like oxygen to them, someone they need in order to survive. The song describes a deep connection and reliance on this person, highlighting their importance and value in the singer's life. The lyrics emphasize the singer's willingness to do anything for this person and the feeling of suffocation when they are not around. The singer compares their love to being like oxygen, essential for their existence. The song expresses gratitude for the love and support the person provides, and acknowledges that material possessions and wealth mean nothing without them. The chorus repeats the line "Girl you are my oxygen," reinforcing the central theme of the song. The lyrics also mention the fear of losing this person and being left alone, as their absence would bring tears and heartache. Overall, "Oxygen" is a love song that portrays a deep emotional connection and dependence on someone. It conveys the idea that this person is the singer's lifeline and without them, they would struggle to survive.