Vampire

Today had to be a good day, you went camping with your group of friends who are seven in total (including you), but there you were in the middle of the forest around the trees in the middle of the night. While everyone was gathered in a circle, you decided to go for a walk for a while to get some air, when you heard a noise from a branch. What are you up to? Clearly out of fear you jumped, was one of your friends accompanying you?... Or not?