Why does he keep saying sorry?

This guy keeps telling me he's sorry for the stupidest things, and I don't know why...

like

one time I was texting him and he didn't reply so I'm like okay well night and he's like sorry! I fell alseep, night!

or.. he just was creating a boring convo so I said bye and ehs like no don't go I just don't know what to say sorry!

stuff like that..
Why does he keep saying sorry?
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