maybe like "babe"? or if he said it when he was mad, like "stop being such a b" then I'd guess "bitch". but it's probably just a term of endearment, like honey, sweetie, baby, etc.
maybe short for bumblebee..or honeybee?
I call this girl I'm into that. Not bEE but "b". I call her that because its the first letter of beautiful. Its also because I wanted a nickname for her just to be all cute lol. So I thought of b...
A contraction of honeybee perhaps.