Hi. This would just be my opinion on what he is doing.

I can't say about number 1, but I have done number 2. For me, I like to ask people to send pictures of themselves if I care about them a lot because I miss their physical presence near me, and just seeing how they are at the moment makes me quite happy. Looking at someone I care a lot about brings a smile on my face.

Number three could be that he needs a social break. I can not handle being around people and talking to people all the time, so it could just mean that he needs some time to himself in order to mentally be ready to talk again. It's not that he's avoiding you, just that he needs to "hibernate" for a few days.

This is what I think based on personal experience.