Why would a guy ring a few times or texts concerned if I haven’t responded in a few hours we are only in the talking stage?

I’ve only been speaking to a guy for a week. First time I haven’t responded in a few hours and he’s rang quite a few times and also said ‘it’s getting on my nerves babe that you aren’t picking up your busy when I wanna talk to you🤣❤️’

I couldn’t tell if he was being serious or joking. However I don’t understand why it matters as we aren’t even in a relationship?

Why would a guy ring a few times or texts concerned if I haven’t responded in a few hours we are only in the talking stage?
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