This is a song about longing. The narrator still desperately wants to be with this girl. She's moved on and he hasn't. He hates her new boyfriend, and is trying to hate her as well but can't. His friends, though well-meaning, don't offer any solace with their statements of a "B-Rate version of me". He could use her around, just like how things were before. The last line "I know he's what you need" hints at problems within the past relationship, and the overall tone of the song suggests that it wasn't the narrator's choice to be apart.
This is a song about longing. The narrator still desperately wants to be with this girl. She's moved on and he hasn't. He hates her new boyfriend, and is trying to hate her as well but can't. His friends, though well-meaning, don't offer any solace with their statements of a "B-Rate version of me". He could use her around, just like how things were before. The last line "I know he's what you need" hints at problems within the past relationship, and the overall tone of the song suggests that it wasn't the narrator's choice to be apart.