That's interesting way of putting it: "Living as an undead"
I feel this way all the time, my CTB is so far away (A few years), and yet all the while I try my hardest to pull back from society, so I feel like ghost, that doesn't actually exist, like the idea of me as a person, is more real than the physical reality of my conscious brain and physical body. My hermit life style has rendered me more a memory for the people I used to know, than that of someone they can actually interact with.