Why does he act like he isn’t into me at all but panics whenever I get into a relationship & wants sex from me?

Is it because I’m not attractive enough for a relationship but he still wants to sleep with me so when I’m in a relationship he panics as that chance of sleeping with me is gone? He even tried to get me to cheat with him.

Why does he act like he isn’t into me at all but panics whenever I get into a relationship & wants sex from me?
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