Do guys ever pretend to be good to get girls to like them?

There was a guy who was super nice when he thought I was able to date him and after I rejected him he hated my guts

It occurred to me today - he hated me because he spent 3 months pretending to be a good person to get me and then when I rejected him all his effort went to waste

Like would you be angry if you spent 3 months working for a boss and then he refused to pay you?

I do things cause I want to and not because I want to be liked so I don't hate people who turn me down
Do guys ever pretend to be good to get girls to like them?
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