Based on the Five Finger Death Punch song "Walk away".
My wererat, Phenal, has changed in front of a woman he is in a relationship with. They were probably in some argument where he is trying to convince her that maybe they shouldn't be together anymore, and ended up shifting. She is horrified to say the least. The lyrics match pretty well.

"I'm sorry for the demon I've become.
You should be sorry for the angel you are not.
I apologize for the cruel things that I did
But I don't regret one single word I said.

Just walk away, make it easy on yourself.
Just walk away, please release me from this hell.
Just walk away, there's just nothing left to feel
Just walk away, pretend that none of this is real."
~Five Finger Death Punch

Essentially, the song is saying that if you leave now, you won't have to get more hurt than you already are. So, Phenal and the woman won't have to deal with this serious complication in their relatonship.