Hi Celebrant,
Welcome aboard!
I understand how frustrating it is to be blamed for everything in a person with BPD's (pwBPD) life. The lack of accepting responsibility for behavior is very common amongst pwBPD. Most of us here have been profusely blamed for things. PwBPD tend to use coping mechanisms to avoid their own behaviors, feelings, and emotions.
Depressivity is common characteristic of BPD. A pwBPD will frequently feel down, miserable, hopeless. Also, there is a tendency for a pwBPD to have pessimistic views about the future and low self-worth/self-loathing. It is very difficult for a pwBPD to recovery from this mood. Unfortunately, the core of BPD is emotional dysregulation. PwBPD have a very difficult time regulating and controlling negative emotions, such as shame, anger, and sadness.
It is a great start using communication techniques/validation/boundaries. It does take a bit of time, but I have seen significant progress with my pwBPD. How does your wife respond to the communication techniques? Is your wife currently in therapy?
Therapy is a great way for us non-BPD partners to cope. The most important thing for those in a relationship with a pwBPD is to take care of ourselves first. In addition to my own therapy, I have been practicing mindfulness. It has really helped me out when I feel stressed out from my bf's behavior. Take a look at this article, it really made a difference for me.
TOOLS: Triggering, Mindfulness, and the Wise Mind