WHEN WHY WHO WHAT

In relationships, when is it okay to ask those questions. For some couples it takes 2 days. For others, those questions are not allowed. Which couple seems that have more confidence and security? I dont know. "I willl tell you everything and all to prove I love you". That seems too crazy. Always telling what and who you are with where and when. Its too much for me. On the other hand I cant stand not knowing any of the time. I like to know whats going on. What is the happy medium? I have yet to discover it with someone but I am crossing my fingers.