I don't think so. If you have a best friend, you can share your ideas, your life or everything with him or her. Maybe it is easier for you to talk about personal things to him or her than your parents. And they will give you some true advices or at least they can make you happy if you are sad , help you if you meet dificulties or something like that. There are a lot of benefits from having a best friend. And I think that aloneness is not a good idea.