If you are depressed, say it. If someone asks what's wrong, what should I answer?

I'm glad to answer this question for you. My personal opinion and advice to you are as follows. First of all, you described it as depressing. Tell him what happened when someone asked you. You don't know how to answer. First of all, if you describe this problem, are you willing to share your troubles with this person? If he is your good friend, you can tell him exactly what you are depressed about. If you don't want to say it, you can say thank you or care about something. I'm just posting it casually and answering it.