Goodbye does not mean forget


Good bye: used to express good wishes when parting or at the end of a conversation.
I have said goodbye.
I have parted
I have gone

Forget: fail to remember.put out of one's mind; cease to think of or consider.
I have not forgotten
I have reflected
I have not, stopped thinking about you


But do not flatter yourself dear...      


Though I have not forgotten, I have made new memories
Though I have said goodbye, I have made new hellos


This is not goodbye to you, but to him
The one who used to love me.
   The one who forgot me