I guess he's depressed?

The guy I talk to on an app had told me "Something happens to me all the time". So we used to talk every day but now he has not been texting me for some days. I texted him a message yesterday but he didn't read and not online. He's not been entering the app since we talked last time. But my message is delivered to him. He didn't delete the app. He just doesn't enter. Maybe he's depressed again... Isn't it hard to talk someone who is constantly depressed?
I guess he's depressed?
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