It may be a defense mechanism to something that has happened to you. I too prefer to be alone a lot of the time. I know that I will not hurt me as far as words go. Others always hurt me and I guess I prefer to destroy most friendships before they take off so that I won't be hurt later. You are not alone in this. I hope this helps and I hope you feel better, which ever you choose to be. I do not believe in making someone feel a certain way, if you want to feel a way and it makes you happy then you should follow your heart. Good luck.