In my opinion, I feel that Billy just wants to feel appreciated and loved again, and that's why he wants to replace Bf, not only to have his girlfriend again, but also to be with the people he loves.
The whole song is beautiful as I honestly feel that it expresses a beautiful feeling of how we want to be with the people we love and will continue to love for the rest of our lives.
The team did a phenomenal job !
Rest in peace Divide🕊