If anyone can keep a secret, it’s definitely you, Leo. The more important the secret, the more vigorously you are going to protect it. It’s the importance of the situation that makes you keep mum: you are privy to limited-access info and you are eager to take full responsibility for its safety.
Since you take secrets very seriously, you do not promise everyone to keep them. You’d only be willing to protect the confidences of the people you trust and personally like. However, if the secret you are asked to keep puts another person’s well-being at risk, you will not hesitate