Hi Dod,
Welcome to the boards! Finding out about BPD is like removing blinders. Everything begins to make sense. All that you've been through with your pwBPD has a reason! It's so empowering to have a name for it. But then what? How do you tell your highly sensitive pwBPD that you think she has BPD.
Usually, it does not go well. The pwBPD begins to feel like you are 1. Criticizing them and putting them into a box 2. Think you think they are crazy 3. Are turning them into a project where they are the problem person in the relationship.
Sometimes getting the person into counseling may or may not get the diagnosis of BPD. Many counselors will not even diagnose it because they don't want to the person to feel like a diagnosis and instead just focus on fixing the behavior.
A couple questions for you:
What is the purpose of telling her she has BPD? What do you expect to get out of telling her? How do you think she will respond to you diagnosing her with BPD?
We have a lot of workshops and lessons located on the right side of the page. These can help you begin to understand the dynamics in a relationship with a pwBPD better, learn new ways of communicating, and some tools to help you begin to respond differently to your pwBPD. In my opinion, and this is solely my opinion, I think if you begin to apply some of the tools, you will see changes in your relationship with your wife and you won't need to tell her about BPD. To start you off, here is a link to one of our lessons discussing whether or not to tell someone you think they have BPD.
https://bpdfamily.com/message_board/index.php?topic=76633.0