How do I talk to my wife about seeking therapy for BPD?

I've looked at the symptoms of BPD and I'm sure my wife has it. I'm growing so tired of walking on eggshells. for a time I thought her behavior was my fault and I thought I was the worst husband in the world. I almost thought of divorcing her so I could make her happy since nothing I ever did seemed to keep her happy. It seemed like my very identity offended her and still does. When I first realized I was not to be blamed for her behavior I thought that she was just naturally abusive. Then I started googling her behaviors and found many references to Borderline Personality Disorder. I've learned that if she's properly diagnosed and willingly submits to treatment she can improve. However, I just don't know how to approach her. She does not take well to any perceived criticisms. the last time she thought I criticized her she was mad at me for a week. Any Advice?

Put the internet to work for you. via Personal Recipe 2629979