You know about the tv shows: the vampire diaries ,true blood,originals ,true blood ,Buffy the Vampire Slayer etc.... Some of them involve a vampire being in love with a human. ;or the characters could be another supernatural being that is in  love with a human. They soon know that they can't be with each other forever because that can cause bad things to happen. The human would want (sometimes )to become ,many scary risks can be taken ,and the age differences. Soon enough they'll have to let each other go and hearts will be broken . But sometimes they will make it work and they'll stay together and will make a life together .