Hello sufferinghubby: Thank you for bringing your concern here to PC. Since this is your first post, welcome to Psych Central. The borderline personality disorder forum may also be one you'll want to take a look at:

https://psychcentralforums.com/borde...lity-disorder/

And then here are links to 9 articles from Psych Central's archives. The first discusses how to survive suicidal thoughts. The next 7 are on the subject of BPD & relationships. And the ninth is on DBT as a treatment for BPD:

How to Survive Suicidal Thoughts

Roller-Coaster Relationship: Your Partner with Borderline Personality Disorder | Partners in Wellness

Loving Someone with Borderline Personality Disorder

Living with & Loving Someone with Borderline Personality Disorder

https://psychcentral.com/lib/couples...lity-disorder/

https://psychcentral.com/lib/how-to-...dium=popular17

https://psychcentral.com/lib/how-to-...dium=popular17

https://blogs.psychcentral.com/careg...dium=popular17

https://psychcentral.com/lib/dialect...isorder/?all=1

I hope you find PC to be of benefit.