She tends to lash out more often when I have made any sort of decision, right or wrong, on just about subject.
This would indicate that she has a high need to be in control of all decision making, and wear the pants in the relationship, so to speak. If you are willing to defer to her at all times you will probably spare yourself her wrath a good deal of the time. However, you may not be willing to live like that.
If you are not, then your only viable option is to for you validate her feelings of frustration at not being able to call the shots at all times, but that while you are willing to occasionally defer to her, you are not willing to do so at all times. An eruption will likely ensue, but if hold the limit a few times, she may be capable of adjusting to the painful reality that she is not actually omnipotent, which is a developmental stage pwBPD have not mastered. Good luck to you!