Why is he ignoring me?

P̶o̶s̶i̶t̶i̶v̶i̶t̶y̶.

I messaged him and he hasn't even "seen" the message but he's been online the whole time our las convo was him saying "I just annoy you by saying your name" and then I said "no you don't annoy me" then he said "Fr" then I said "yea you don't annoy me" and that was our last convo. Did I say something wrong? Or does he not like me as a friend so he's ignoring me? Cuz he's not that type of person he talks to everyone he's very friendly to everyone! Or is he testing me for something? Honestly idk

He's my best friend btw