Im in love with a narcissist

How can one be so willing to look past red flags, and fall deeply in love with someone who is a walking heartache? What's worse is how he knows he is a narcissist, yet does nothing to fix himself. I admire his willingness to own up to his flaws. The way he warned me from the moment we began talking that he had issues, went in to hours long details of the way he is. Yet as he spoke on all the negative and the pain he was admitting he was going to cause me, all I could do is stare in his eyes and fall deeper in love with every passing painful word. Perhaps it is Stockholm's syndrome that makes me cling to him harder every time he hurts me, stands me up, lets a holiday pass with nary a gift or even a flower. As I am willing to ignore it because I don't even feel the pain. I only feel the love. And as long as he allows me to love him, and he loves me in return, I can handle the rest. A walk in the park really. And maybe this is how a narcissist makes a relationship work. By admitting fault, and falling in love with the numb partner that can be indifferent to the vile treatment and mental sufferings they will certainly inflict. Perhaps the numb girl and the narcissist boy are the perfect cocktail for a forever type of love, because I am not going to let him go, and I think its pretty clear he wont be leaving me anytime soon.