Why did he shut his phone off?

I liked a guy who said he did not feel the same (in a very kind way) so we agreed on staying friends. He was being sweeter to me now than before I confessed.

We stay in different countries and talk only on text and recently got into a bit of argument. He thought I still liked him and was getting too close, although I was only being friendly (did not flirt AT ALL, talked only like I would with any friend). In the middle of argument he went away for two days, not coming online on any of his socials (I know from his last seen and only single tick on Whatsapp messages for those two days). He never does this and is quite active on whatsapp/telegram.

If he got so affected, does it mean he cares?

Why did he shut his phone off?
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