What should you do when friends keep secrets from you?

You shouldn't bring it up or question her or him for a while and let her or him cool off and watch to see if they become depressed, or sad all the time. If this continues to go on for a while you should bring it up, not in a pushy way but in a casual understanding way. If she or he wont say then its probably best to leave it alone because its most like something personal. If they say what happened, then you want to say that you understand and help her or him get through whatever is going on in there lives. Trust me, I have been in this situation before and I didn't like the anticipation or worrying in my mind. You should just be a kind friend and tell her or him that you care about them and that you'll always be there for them. Trust me, that's would i would want to here whenever Im in that situation. It helps ALOT! Good luck and i am sure your friendship will be just fine. Just follow what I told you.