That is a very unusual dream indeed. Honestly I have no idea what it could mean though.
Very Gothic!
This is definitely a vampire dream. Needing sustenance, support, energy, from some other Human Being. It just came out in a bit of a dramatic way I think in the dream.
Don't worry. Most of us draw energetic assistance from people around us. Whether we really should or not....? well, most of us do. In one way or another.
If you had been watching any vampire movies, or reading anything like that, it could have got into your subconscious that way.