Just as I thought.
You are physically giving him his space. But spiritually, you
aren't.. he will feel the pressure that he has to "report strength"
to you and resent it.
If he does not want you to know, and he really is going out with
his friends, your bugging him about it will only lead to anger on
both sides... if he wants to tell you, he will.
Imagine if you are made to report all your movements to him by
him... does it mean he does not trust you? Turn it around, he
probably feels he is not trusted by you.
Ultimately, both of you gotta talk about this, honestly, without
throwing tantrums, without anger... agree on these conditions
before starting. Maybe you'll figure out what is bugging him.
I hope both of you work out and are ultimately happy 
There is already too much heartbreak and melancholy in the world...
best of luck...
