Whispered goodbye as she got on a plane
Never to return again
...
This love has taken its toll on me
She said goodbye too many times before
And her heart is breaking in front of me
And I have no choice 'cause I won't say goodbye anymore
Clearly "before" is needed to rhyme with "anymore". Also it is referencing the times she said "goodbye" before she said it this last time when she got on the plane.