Being the weirdo I am, I found this really interesting documentary about Teenage Vampires that I think you might dig. There things about this way of life that I can not agree with, but I do feel that before anyone passes judgement they should watch this. Making people feel fucked up for being different is never cool, unless they are harming others or themselves. What I took away from watching this is that there are some teens that really feel they are lonely and isolated, so they turn to drinking and sharing blood as a form of catharsis.
https://youtu.be/y9GJ-VhBaGE