I just told my best friend about it last night, I tell him everything so I did really want to. When I told him though he thought it was really odd but he was understanding and not the least bit judgmental (thank god!) I had such anxiety telling him however, worried how he might react. in the end I'm glad I did because now I know I still have his support and friendship.
I think its important to tell the people you really care about and who are important to you about the things that are happening in your life and who you are. people like your best friend or partner because they are the people who care about you heaps and want to see you happy. Its a tough thing to say that your an AB/DL, especially to someone you care about, but in my opinion it would be worthwhile considering