Even though I'm connected to facebook and my privacy settings are ok, I've never been able to add friends. My sister added me and it was ok for a while. Suddenly, about a week ago, she couldn't see me anymore, but I still could see her. As of this morning, I can't see her either. And I don't have the option to add her, as I've never had it to begin with. What can I do about it? I play on an Android device. Thanks