Best friends and love?
Well its a very hard relationship to maintain because if you love your best friend, and they know it, it can become complicated. For example, your friend could feel the same way about you too, but doesn't want to ruin the friendship, so you stay as friends and its awkward becasue you want more out of it, than just friends. You could just stay as you are and just wait it out and see what happens. You could tell your best friend, and be brave about it, so you don't have to worry about what could have been if you didn't try and let them know the true feelings you have for them. It's really hard to do, but I think its worth it, personally. Its also good for your best friend to know, because if you are truly best friends, you probably tell each other everything, and you would want that friendship to last, so I would tell that person how you really feel, and see what the reaction is. You can't loose anything from being honest.
What is a good name for a book about a girl who becomes best friends with a vampire but she finds out he killed her friends?
As best friends, you already love each other. But if you have strong feelings for that person and " truly love" them back , then consider dating or having a deeper relationship. If you don't share the same feelings, then tell them "I love you too, your such a great friend." Its a perfect, indiscreet way to say you just wanna be best friends and nothing more.