Do vampires really exist...I mean like in real life?

Mythological vampires do not exist.

However, some believe that they are vampires. These people are grouped under the category 'otherkin', which is people that believe that they or their spirits are something other than human (those who believe that they are animals are called 'furries').

Otherkin vampires fall under two main categories:
Sanguine - vampires who drink blood. Some drain wild animals whereas others go into bloodplay, which is usually used for sexual gratification. It is not considered honorable for a sanguine to drink someone's blood if the person has not consented to it.
Psychic - vampires who believe that they are powered by energy. If a psy feels drained, they feel that they do not have enough energy or that someone has drained their energy. Psy vampires believe that they have the ability to drain others' energy. There is a vast range of code and gestures associated with psy vampires.