Hi Kmacp5,

My short answer don’t. I’ll give you a few reasons why. We’re nit doctors or professionals we can’t diagnose only a professional can do that! What we can look at are BPD traits amd his se boundaries are built around them.
If your SO does have BPD thee is a potential that the symptoms will worsen if you tell your SO.
Finally, let’s switch roles what if you were told that you had a serious mental illness one that is difficult to treat, one that to this day has a stigma attached to it? I’d get upset if someone close to me said that I had BPD.
I completely understand the space that you’re in when you first discover BPD it’s like an aha moment, you see an acronym that describes perfectly what you’ve gone through,you might scared because it can sound scary and sad when you first read about it. I suggest that you talk about it here.