Near a dead vampire
yes
After the guy has come running to you and you complete the quest by slaying the vampire you should learn that he lives in the imperial city.
yes dust mites can get anywhere dust can get.
Once a week or they turn to dust
No, you do not. You can only become a vampire by being bitten by one, either contracting Porphyric Haemophilia from vampire enemies, or by allowing Vicente Valtieri to turn you into one.
No, I do not have a vampire lover, therefore I cannot find him.
A: You cannot find the vampire, because vampires do not exist.
Vampires turn to dust in the light. That is why they sleep in coffins.
vampire bars
To my knowledge, you can not find a specific person in Vampire Wars unless they are in your clan. Vampire Wars does not have a search engine to find its members.
there is no such thing as a vampire, so you will never, ever meet or find one
You can find a vampire in movies and story books only. Vampires do not exist.