There are things in the world is to better be left unsaid.
We are not saying and telling because of various reasons, but most of the time, "Jaga hati"
I once told a friend, as long as I believe I'm not doing anything wrong, it should be fine for me not to reveal everything even to the person most important to me.
But, never get me wrong. I'll try my best possible not to keep secret, anyhow if it's something not to be shared, I wont tell. That simple!