(What if I can't forget you?)
Collide invisible lips like a shadow on the
He can't forget he or deal with the breakup, while the scream appearing behind the primary lyrics uttering the same thing is referencing to how many times he has said it and screamed it out of anger.
As caraphernelia means to not be able to forget about or deal with a relationship after someone has left, he is reaching for a necklace that she has left behind.