How do I know if he is into me?

I've seen a guy at the gym and he looks very cute. I've only met him 3-4 times and we haven't talked yet. I want to find out but I dont know if he is into me but he looks when he sees me? I dont want it to be awkward so Im confussed!

What do u think I should do? Any ideas?
How do I know if he is into me?
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