to me it's about a relationship.when he says it's not over say it's not over i'm begging for mercy i'm only the monster you made me.especially when he says say it's not over,he's begging his girlfriend/ex girlfriend to not end the relationship,he also says forgive me for all the damage done he's admitting causing pain/hardship in the relationship and he's sorry for what he did.he also says i'm only the monster you made me meaning that she is the reason he is the way he is now
to me it's about a relationship.when he says it's not over say it's not over i'm begging for mercy i'm only the monster you made me.especially when he says say it's not over,he's begging his girlfriend/ex girlfriend to not end the relationship,he also says forgive me for all the damage done he's admitting causing pain/hardship in the relationship and he's sorry for what he did.he also says i'm only the monster you made me meaning that she is the reason he is the way he is now