Hey mssalty
In reading the above, I can see how me trying to have a discussion about a statement made (in which my intentions are simply to figure something out, not call out my SO), is seen as invalidating.
I'm not BPD that I know of, but in keeping with your example, let me point out how it probably processes. trigger warning, it will probably sound invalidating to you, bear with me :
they says its stale. "obviously" they're trying to draw attention, at face value you'd think its to the juice, there's something wrong with it right? but no, its about them, it always is with BPD, but they may not know "proper" ways to draw attention to themselves.
You focus on the reason the juice is stale, strike number 1, they just failed at getting your attention, gets angrier.
they repeat their bid for attention: No, the juice is stale, aka, pay attention to me not the damn juice.
you keep at the juice, strike 2, its not about the juice. Now they feel like you are blaming them (did you check the seal?)
Another comment on the juice situation, strike 3, "you don't get it" they think, I just wanted your attention (The juice is still stale).
The "correct" response depends on the person, but its mostly about feelings with BPD. One way I thought could go something like: "It sucks to have stale juice (empathy). what's that staleness tastes like? like bitter or watery? (focusing on them and their experience). we'll get a new carton after work, lets get something to eat while where out and about! (common goals, time together)
When you're used to that and suddenly someone is coming at you with both barrels at the slightest assault, I tend to go inside myself and wonder what it was I did wrong
That's the core of the issue isn't it? did you actually do something wrong?
I think we logically know we didn't, but the response is basically trained so deep into our mind it becomes instinct to react that way.
What is most frustrating is that I don't have the right to my own frustrations and anger, and it's always okay for them to blow up at me or someone else, but never okay for me to blow up at anyone.
Remember, acting on frustration doesn't always mean lashing out "eye for an eye" style, maybe just stand your ground.
Why don't you feel you have the right to your frustration? because of their reaction? why is it ok for them to blow up?