Even in friendships, mind your business. If they don't tell you, they probably don't want you to know, or just not yet. You are not entitled to knowing what's going on at every point in your friend's life.
Sending me on an errand that requires constant communication with you, and then suddenly, when I get there, you stop picking up your calls.
I can’t act or make a decision without hearing from you, so I end up sitting and waiting while calling you repeatedly for several minutes.