My guess is that your life is not full of drama, anxiety, and mental disorders. But this could change if you were to become an addict/alcoholic.
Read up about the Karpman drama triangle on this site. She plays the Rescuer role for friends and family, and my guess is that she is in the Victim role in your relationship while you play the role of her Rescuer. That's the standard pattern with BPD. The challenge for the Rescuer is to learn to stop Rescuing -- which is far, far easier said than done, and can even lead to an identity crisis.