I am not sure what red flag you mean? Him worrying? It is very much opposite of red flag. My mother is battling cancer and at that time was just out if surgery, I was gone all day and not replying to his texts and calls. I don't memorize phone numbers so I have no ways to call him
From other numbers. He really worried something happened to my mom. He is a devoted son himself so he worried

. We also both live in a busy area and commute bumper to bumper on the road that has daily accidents to top it off ice and snow! It is worrisome if people don't reply. So it meant that he is caring person which he is. He might not be available but he for sure is caring

Maybe you misunderstood or I did

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