Setting a new boundary is a change, and change is rarely comfortable. To your partner, the change can feel non-consensual. The key with boundaries is that you always set them around those things that are yours: your body, your mind, your emotions, your time, intimacy with you. You always have a right to regulate access to what is yours. But by the time the boundaries of your self have become blurred with those of your partner, setting boundaries and defining your self feels like taking something away from her that she had come to regard as hers.
