I know this one guy through mutual friend. We are friendly and talk to each other. But then he doesn’t accept my IG request?

We met twice and were friendly to each other and talked quite a lot. He is not my crush or anything like that. But just feel weird and can’t get my head around it. Does he dislike me but still talk to me like friends outside?

Updates
+1 y
Both meetings were with our friends. After the last meeting, I knew his IG from my friend’s tag, so just sent him a request out of courtesy. This is just a friendly IG request, but since he is not accepting it, that kinda got me interested and slightly obsessed what is possibly going wrong here. Although he might not be interested in me, but I mean as friends. It’s not like we are total stranger.
I know this one guy through mutual friend. We are friendly and talk to each other. But then he doesn’t accept my IG request?
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