Twitter is a great tool to find intesting people and lot of friends. On the twitter’s page you see only some minimalistic statistics showing you how many people you follow and how many followers you have.
In my eyes, in the twitter terminology “friend” should be only called a “friend” if you follow him and he or she follows you – so that there is a direct relationship.
Watch out the friendorfollow.com website which shows you all that relationships in a customizable order and organized by a good terminology, grouped in tabs called “Following” showing people you are following. “Fans” are people following you and “Friends” are people you follow and they follow you.
That tools is great to clean up your profile from people you probably should not follow.