Oh Liz the Squeek, when you said this
"The removal of the stressor has to be final. It can be long term temporary, but it has to be complete."
You proved that you are a very wise woman. It is also without doubt a terribly painful process. Sometimes it comes down to having to decide whether you will be better alone and healthy or partnered and sick. At least when you are alone you have the opportunity for a better choice in the future.
marty