It's possible for Narcissists to feel remorse, but it is a rare occurrence. I saw true remorse in one of my narcissistic parentals once, so it's not completely impossible.

However, from the sounds of it your mother isn't able to really look at how her actions have affected you, to do so would shatter her sense of self. That may change at some point or it may not, I do not know the woman or the ins and outs of this whole situation so I can't really say what'll happen with any certainty.

Even if she is never capable of genuine remorse, why should that mean you love her any less than you do? It doesn't have to mean that. You can still love her and set firm boundaries as to avoid any further trauma for yourself. It's not black and white. Just because someone isn't capable of remorse doesn't mean there's nothing about them to love.

Speaking for myself only, I am incapable of remorse, but there are people in my life who are well aware of that fact about myself and they don't mind. I'll be honest, I don't have a clue what "love" really is or what it means outside of a purely clinical perspective as I've never known the feeling. But even if you do have to "give up" on her, why does that mean you love her any less?

It sounds like you might benefit from just accepting that your mother is who she is, you can't change her. Only she can do that if she chooses.