Understand that if it doesn't work out you're in for more than just dropped phone calls, bitter stares, or awkward run-ins. Vampires harp. Vampires do not know how to move on. We've had a long time to learn how to properly sulk. And sulk we will. If you break that vampire "heart" be prepared to witness mood swings, occasional stalking, and minor threats to new love interests. An ex-boyfriend vampire might turn into one huge killjoy.