Goodbye is "I'll see you again when I'm ready to hold your hand and you're ready to hold mine.
while
Letting go is "I'll miss your hand. I realized its not mine to hold. and I will never hold it again.
I am not ready to say good bye and I don't want to let go but I need to move on since you are not mine anymore. I am not okay I lied when I said I will be okay. I lied because I want you to move on not to worry about me.
missing that person is killing you day by day.