Have you spoken to your gp or your hairdresser? There are many conditions which can affect hair loss- diagnosable by blood tests- plus external factors such as silicones in shampoo causing hair to break. (I know this because mine started falling out last summer, and I'm a woman!)
They say that you should look to your mother's father to see what your hair will do, as there is evidence that the balding gene is carried on your X chromasome, i.e. it comes from your mother.
As a heterosexual woman may I say that a man's baldness or otherwise does not affect his attractiveness? A man who is comfortable with his looks, however, is more attractive than one who worries about them.