Hello cdeon and welcome!

I'm sorry for the circumstances that brought you here, but I'm glad you found us. And I'm so glad you were able to maintain your friendships! A support system is so important and pwBPD do have a tendency to alienate their loved ones from friends and family.
I hope you won't mind if I ask a couple of questions for clarification. Have you and your wife agreed to an official separation? Or is a more informal pulling back on your part?