How to change myself from nice guy to bad boy?

Many people tell me that I am handsome, i have good dressing style and i have good body. even I don't ask them about that.

I kissed one girl suddenly, she told me I know u r nice guy and that is why I am not going to hit you, but I don't want to be with you.

No one wants to be with me, I am just handsome for them. do I need to be really bad boy?
How to change myself from nice guy to bad boy?
How to change myself from nice guy to bad boy?
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