Why would a guy be so secretive if we aren’t together?

I like this guy but at some times it feels like he’s into me too but there are times he puts me in the friend zone. He’s gotten upset a few times I’ve hung out with some guys but later on he reminds me we are just friends.

The days we are together he keeps his phone at a distant but will check his phone constantly at a distant. We hang out in his living room but he leaves his phone in the kitchen. I asked if I could see what he’s up to on his phone which ended with an no. I even told him he doesn’t need to hide anything cause we aren’t actually dating but he continues to be suspicious. All of this just started happening. He was never secretive with his phone like that or keeping it far away from us.

I really like him but I’m not sure whether to continue to fall for him or date other guys.

Why would a guy be so secretive if we aren’t together?
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