Hiding Something

I've never really been in that kind of situation. I think if there was a secret between two people that one of them didn't tell the other, it would kind-of hurt the relationship. They might not want to talk about certain things and change the subject a lot. They would be fidgety and nervous when they did talk about that subject. The other person might see that they're holding back and wonder if they did anything wrong. It would just be difficult.