What does his behaviour suggest?

So I’ve only met him twice. The first time he was warmer with me, more tactile. Second time he was colder. At the beginning I felt so nervous, he also looked nervous. Then I relaxed and he suddenly went tired and sleepy communicating with me. We are technically strangers, borderline acquaintances. He’s married but I would never suggest I’m interested in him. But I admit I do have a crush but wouldn’t cheat.
What does his behaviour suggest?
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