Hello Scott,
I am in a similar situation - and my wife is seriously considering divorce. I feel your pain.
Things are normally good, unless there is a disagreement, over something that seems minor to me - and then depression, rage, projecting, and other negative behaviors come forward.
If your wife does have BPD - you have a hard road ahead of you. And there is hope. I am not in a great place right now, but these boards have many success stories. You have to check with yourself to see if you are up for that kind of commitment.
To help you make your decisions:
Read this post -
https://bpdfamily.com/content/what-does-it-take-be-relationshipIf you have time over the holidays - please consider reading some books on BPD. It is eye-opening. It will help you understand your wife, and your reactions to her.
Best books in my opinion are: Walking On Eggshells, Walking On Eggshells Workbook, Loving Someone with Borderline Personality Disorder
Even if she will not get help
right now, there are things you can change in your behavior, so she might get help
in the future.
Trying to force therapy too soon might make things worse. You also want to verify that the counselor understands BPD.