As long as you know you are the same, we can't worry about what they think any longer. They don't care about what you are going through, only about themselves at the present moment. So, we deal with us the best way we know how. It's not always correct, but at the time, it's the best we can do.
SG,
You have your way of coping and the W has hers. Maybe she didn't want you to see how upset she was that she was leaving. We don't know what they are feeling because they usually don't tell us, or when they do, it's just what they feel at the moment and it changes like the wind.