yeah, Last year someone in my Social Psych class had the same fear. we were about to watch a movie, and so he turned the lights off. She freaked and run out of the room into the hallway. It was funny at first, until I (we) realized that everyone has a different fear, and the dark isn't to be reserved for kids.
I'm thinking tho that your b/f did that just so he could come to your aid while you were in the shower
(just tryin' for a grin
)