You see a vampire in your dream. the dream about vampire symbolizes sensuality, seduction and your emotionally and sexual nature.
The vampire may also represents many things such as fear, death, civility and violence. if you see some people in your real life, they are a vampire may refers to hurtful and violent towards you and your feelings. also consider someone in your life wears these two faces.
If that dream yourself are vampire represents you use everything you have around you to further your own goals.