Actually it can, at least among women, re the friend who looked for empties when she suspected her friend had relapsed, that I mentioned above. She needed to know in order to decide on a course of action. Good friends are there when their friends are potentially in trouble. Maybe you're not as close to your friends, Allie, as these women are. It turned out her suspicions were correct, and she was able to help her friend through.
Anyway, people you love just don't drop out of your life for no reason.
So, maybe Adriana might have taken her best friend aside earlier on, and confided in him. Then he would have known. I'm still not excusing the email hacking, but I can certainly understand the concern. Also, we all assume this is a platonic friend, but maybe they did have a romantic relationship? Adriana, are you male or female attracted, or bi?