In my years, I have had limbs removed. I have been stabbed through the chest. I have been assaulted with fire, both natural and mystical. My body is nearly impossible to destroy. That said I am not 'immune' to it, per se, it merely cannot inflict any lasting damage to me. As for your other question...
[Her tone shifts from prideful to serious.]
I will not lie. Sometimes, knowing they will simply leave my life one day makes it difficult to truly care for people. Furthermore, it can make it difficult to even understand them. Such frail and easily slain people, who will be gone in the blink of an eye. I find I can no longer entirely understand what motivates them. But I am not lonely. There are other long-lived beings aside from vampires. I seek my friends among them.
Voice
[Her tone shifts from prideful to serious.]
I will not lie. Sometimes, knowing they will simply leave my life one day makes it difficult to truly care for people. Furthermore, it can make it difficult to even understand them. Such frail and easily slain people, who will be gone in the blink of an eye. I find I can no longer entirely understand what motivates them. But I am not lonely. There are other long-lived beings aside from vampires. I seek my friends among them.