Hello NightBreeze and welcome

I'm sorry to hear that things are so bad with your wife. Yes, it can feel like living in a crazy house! We get it.
When your therapist suggested you read about BPD, what have you read so far?
We have a lot of information on this site that can help you to better understand BPD, as well as tools and skills that can really help make things better. You can start exploring them under the "Tools" tab at the top of the page.