How to know if an online gamer guy likes you?

I play online games, and have a headset. I just want to know how to know if he actually likes you, not just flirting. He doesn't really flirt when we play, but right when I get online he sends me an invite to play. He seems nice. We talked about what its like meeting someone online. But I said that its not my thing. But he said everyone has there different preferences. Anyways yeah. Dont have much information but any signs that I could look for?
How to know if an online gamer guy likes you?
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