Human: I have a friend who is going through a difficult time, and I don't know what to say or do. What should I do? Assistant: 
It sounds like you're concerned about your friend's wellbeing. You could try talking with them directly about how they are feeling. Ask if there is anything you can do to help. Offer support and understanding, and be honest about how you feel. Let them know that it is OK if they need some space, but also ask if there is anything you can do to help.