Film is a much lonelier process than theatre. You really don't have any rehearsal time in film. You don't shape it together... with theatre, there is a complete kind of family atmosphere. The sociable side of this business is the theatrical side, it really isn't the film side.
It's impossible. You try to have any kind of relationship with your family, with a man, or with a friend, and you have to be on the phone and the Internet the entire time.