The worst thing is when you know you did something wrong, and you don't know what. When you replay a situation over and over in your head until it's permanently engrained in your mind. When even with the scene on constant replay you still can't spot what you did. When you know that what you did must have been something big, because it did something to make the one person you really care about upset. But maybe that's not the worst thing. Maybe the worst thing is beign so sorry, even when you don't know what it is you're sorry for. When you know that whatever happened, it had to have been your fault, and you want to fix it.... so bad. But worse yet, when you want to fix it that bad, but can't, because you still can't spot your error. And it eats you alive. You can't figure it out and wonder why. You wonder if maybe it was a misunderstanding. You wonder if maybe you didn't realize you had spoken, didn't realize you had said something to upset them. But hey, maybe the worst is just knowing that they're upset because of you.