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By BPD, I assume that you mean Borderline personality disorder. Since extremes and mood swings, and instability of interpersonal relations are hallmarks of BPD. I would expect the opposite-trying to engage you, embracing, loving behavior, and smothering. I am going to include a link that describes the symptoms of BPD so you can know what to expect. The important thing is to try to react with your head (rationality), not your heart (emotionality). You may unconditionally loving of her as a person while still disapproving of her behavior. When you express it (disapproval) do it in the most non emotional means as possible as you do not wish to reinforce the inappropriate behavior. I hope this information has been useful to you and I wish you the best.
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