the girl that he use to be close with has changed and poseses the characteristics of a villain:
selfish, thinks shes hot, thinks everything she does is for the best, acts on her own accord, shallow and so on
though she has changed and has "pushed away" everyone from her past and now no one will want to be close with her anymore "no one will want you back"
so he is suggesting he can help her sort out her head and take her back...
This song reminds me of my sister actually LOL
the girl that he use to be close with has changed and poseses the characteristics of a villain: selfish, thinks shes hot, thinks everything she does is for the best, acts on her own accord, shallow and so on though she has changed and has "pushed away" everyone from her past and now no one will want to be close with her anymore "no one will want you back" so he is suggesting he can help her sort out her head and take her back...