If a guy with a girlfriend at work says to me alone “let’s go party. Let’s drink”‘is he hitting on me?

He also asked about my dating life and makes jokes about me liking other people randomly

he negs me and compliments my appearance too. He said I’m his fave coworker.

If a guy with a girlfriend at work says to me alone “let’s go party. Let’s drink”‘is he hitting on me?
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