Hi Beren!
I know how it feels to get anxiety over arguments and to be so desperate to make them stop. One thing I came to learn, though, was that that anxiety and my desperation were actually helping to make them worse. And it's so frustrating and even infuriating to try your best to help, only to get railed at. I get it!
You point out here that you're JADE-ing. That's a habit it's easy to get into and it makes sense to want to explain yourself. Yet, as has been pointed out to me and to many others here, it's exactly what you should NOT do. It is going to make things get worse. Have you looked at this workshop thread?
https://bpdfamily.com/message_board/index.php?topic=139972.0What if, in the example you gave, you tried something different at #2? What if instead of suggesting or asking any way to get her there you just said something supportive or just asked if she wanted to talk about it? And, if she didn't, what if you left it alone? PwBPD can be hypersensitive to criticism, whether real or perceived -- especially if they're already feeling sensitive/anxious/self-conscious. It can be like hitting someone on a broken bone. Thinking back over what happened, can you look at it from her perspective? How do you think what you said might have been heard by her?
I'm not saying all this to criticize you. At all. I've been in your place. But, we can't control our loved one. We can only control ourselves. And, so often, we play a much bigger role in things than we realize.
I can't tell you how many times I tried to help my uBPDh, only for arguments to spiral out of control and for my words to get twisted. It was only when I started really paying attention to what I was saying and thinking about it from how he might be hearing it (not how I was intending it) that things started to improve.
Here are a couple other articles that you might find helpful. Have you read these?
https://bpdfamily.com/content/ending-conflicthttps://bpdfamily.com/content/listen-with-empathyIt sounds like you're trying to put out fires and rescue her. What if you stopped trying?