I'm sorry to hear that you are feeling empty inside. Try to find some me time and take care of you. TLC
I think that you're talking about dissociation. A pwBPD will alter reality to match their out of place feelings (lying is a form of dissociation) Dissociation is a big part of the disorder and it feels like they move the yardstick around at whim. It is about their emotions.
The original offense will alter change and grow based around his feelings. Someone that changes reality often us a signs of mental illness. Don't be hard on yourself for validating him.
Take care
