What did I do wrong?

We were growing super close, he was opening up, and made every move like we were going to become a "thing". One day, he did a 180° turn, said I was getting too close, and pushed me away. We still talk, but he's distanced himself. He catches himself being fun and cute and pushes off again, starts talking about other women, but gets annoyed when I talk about other men, tries to play it off like he's not upset about it. What the heck, man?
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I should add that he keeps calling me "hot", "sexy", "beautiful", "a rare gem/find". I decide to stop talking to him for awhile, he texts me within moments of making this decision as if he can read my mind lol.
What did I do wrong?
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