Oh, Mendingmysoul, I am so sorry that happened to you.

It seems like you approached the situation from a place of goodness, of helping and behaving in a human, social way. The narc's approach was from one of manipulation. You might feel badly because you figure you knew better than to get sucked in, but your heart was in the right place, whereas the narc's was not. Even though you regret getting into that situation, I hope you can be gentle with yourself, because you did nothing wrong in the eyes of normal people. The narc didn't win, they successfully manipulated No normal person would be proud of that.

Sending hugs your way- from someone who has made that mistake more times than I can count.