Medication! Inappropriate and excessive mood swings are an integral part of the BPD. These symptoms get remarkably better quickly with the right medication(s).
The opposite of love in relationships is fear. When she’s experiencing fear - real or imagined - she will respond with moodiness. By making as safe an environment as possible, you can improve the quality moments.
Like everyone else, everything both of you has needs to be treated. I encourage both of you to look at the screening test, and to pursue the "retraining the brain" processes discussed briefly on the Website and extensively in the book.
