Can someone tell me WHY is he nervous around me? I AM NOT ASKING IF HE HAS A CRUSH. I AM ASKING WHY he's NERVOUS?

PEOPLE keep saying oh he doesn't like you blah blah on her. When I asked WHY IS HE NERVOUS.

Facts: he's a Bad boy.
he's 40.
He has intense eyes that effect me very much and my heart loves him and i feel such a deep connection to him even though we aren't that close. I have cried hard many times just by thinking of or seeing him or being around him. Literally.
Yesterday i tried to make small talk but he replied with one word. So i left it.
But he was nervous or at least i think so around me yesterday. I don't know if it had to do with me. But anyway he had complimented me many times like 2 years ago... But he has also been kinda mean or degrading at times. Like he made a vulgar joke about me to coworkers. I was very mad
Can someone tell me WHY is he nervous around me? I AM NOT ASKING IF HE HAS A CRUSH. I AM ASKING WHY he's NERVOUS?
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