Difficult to give advice about a major life decision, but one thing you could do is to validate that she likely feels anxiety about deciding which path to take.
The thing is that I am not sure whether to just go "push through" this by deciding myself for us (as if she was my child or similar), as I can not get her to "amen" anything for more than a day. One day she is all for moving, and another day (or even the same) she is not only against moving, she is against doing ANYTHING with me and claims that she has no partner in me, that I never talk about anything serious with her (off course not true, we talk WAY too much, hours per day), and similar BPD type arguments.
The worm inside my head keeps me afraid that whatever tension we have here, will be x10 if we really move and come to a place where we are strangers, she doesn't know the language, has quite her steady secure job (which she hates), has no where to run to (she never runs, but needs to always have "an exit" because of her BPD)... I am afraid she might break.
So basically I was wondering if anyone has any experiences with uBPD (unaware of their condition) in times of great life changes? Does the change that they wish for so much make them feel better or worse?
When she has an episode she is all about moving and changing everything. When she is "normal", she is 50:50 and sees a lot of bad aspects of this, mostly fears about things turning out worse for us as a family.