What does it mean when a guy says you are sweet and kind?

Well that depends on the guy. That could be a purely sweet comment saying that you are a great girl or it could be your not my type. If its a good comment look at the guy that said it and see if he is looking for someone like that. If hes a "bad boy" then he is not looking for sweet and kind. If he is a good guy then that's probably what he is looking for. Im assuming however that you are looking to date or are dating this individual. If you add some more information to your question I can answer better.