can result in a state not unlike addiction. Some submissives will gladly 'overdose' on access to easy play. It is the dominant's responsibility to be logical, objective, and unyielding when the submissive proves themselves incapable or unwilling to be so themselves.
But let's talk more about you. While you did agree to explore D/s play with this woman, you certainly did not agree to be responsible for her. If she's told you of pain or traumas she's suffered in her real life, it is possible that D/s play is a way she can feel comfortable enough to confront those issues with someone whom she trusts. Or it may be a way she can hide from these issues. As important as it is for her to deal with and overcome her issues, I suggest you both remember you are her friend, not her counselor. Being her dominant and lover, you need to consider the fact that she might not be capable of thinking clearly or objectively when you indulge her submissiveness. Most importantly, sexual attention does not solve a person's problems. The blending of emotion and sexuality can make it worse, like trying to put out a fire with gasoline instead of water.
Put in the simplest of terms - you have the right, and honestly, the responsibility, to say no to her desires whenever you feel you do not have the ability, desire, or motivation to engage her. She granted you this right when she expressed a desire to submit to you. This means that you control the circumstances on how, if, and when you consent to indulge her desires for domination. The dominant's role is to inform her when what she desires is not for you. Also, finding that equilibrium where you can give her what she wants when you feel able to indulge her on your terms.
Have a long talk with her, and make sure she knows it's a discussion outside the restrictive confines of your being her dominant and her being your submissive. Write out what you need to say in a notecard beforehand so you don't forget anything. At the very least, you will find out if she values your friendship more than what you can provide her sexually.
Best of luck.
Advice Kitty