For anyone being abused by a Narcissistic Personality Disordered person. You have a beautiful heart. Your abuser doesn't like that about you and wants to destroy it, along with everything else that is beautiful and good about you and about your life in general. Sadly, you cannot protect yourself from all the harm this abusive person sets out to inflict upon you. But, you must do your best to protect your beautiful heart.
Never stop. Don't ever stop caring. And always show, and prove that you do. Words mean nothing if your actions do not support them. Simply care for others, and don't let them go thinking you don't, even the little things and show just how much you care.
Sometimes those inner warnings are important to listen to. Our inner selves often know and see truth we want to repress, which is why it will keep bubbling up no matter how many times you ignore it. Take time to truly explore those instincts and feelings.