If they split on you and never come back then it can only be two reasons
You held your self respect and pointed out their unfair actions. It got too real for them to face their own actions(cause they hate themselves). So they better avoid you than see their own self through your eyes.
They found a good doormat. Which means you can expect a hoover soon cause no doormat is ever perfect.
This is the final truth. No "did she not love me enough?" No "does she not miss me?". No "Does she hate me so much?"
My pwbpd is in touch with her rapist and is up to date with his life.Even though she told me so many times how horrified she was with that incident. So in most cases they don't care if you are a psychopath who physically abused them or a doormat who took all the abuse.
The moment you put a mirror infront of them and tell them to take accountability they run away and never come back. Its because they know this is evil but don't want to face it.