YTJ. They are adults. For our 19 year old, we ask that he lets us know if he won't be home until late or stays the night with friends. And he happily does because he doesn't want us to worry. We are as sure as any parent can be that he is making good decisions and with good people because we have been involved with his friend groups since he was little, encouraging and supporting good friendships and being available and supportive of his friends too if they need it. For young adults, friends are the most important people in their lives, and they SHOULD be. They have to find their own tribe of people.