Is he seriously mad at me?

I've been talking to this guy online, we've been friends for like a year now, and I kinda like him and I think he likes me back too. He already knows my face, and wanted to hear my voice, I said it wasn't fair and then joked about him being an old man since he haven't shown his face or voice, and he seemed to be a bit cold after that and cut the conversation

Is he seriously mad at me?
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