Protective guy friend?

I posted something on here where they stated it “seems there was some defensive play on his part” I’m just curious what that might look? Or why? I feel as if a guy friend I have is kinda over protective, but only on the sly sort of ways. Interrupts me talking to another guy by coming up an introducing himself to the guy. If I walk by and it’s crowed he has placed his hand on my mid back to guide me through.( but I wasn’t looking at him or speaking with him I only knew it was him because I looked to see who was touching me). Friends tried to hook me up blind date with his friend and he basically slapped it out of the air. They were excited about it but he was not amused just say “I don’t have socials so” and that was that. I don’t get why he does these things?
Protective guy friend?
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