You cannot try to fake yourself in order to imitate someone. It takes away your own identity and personality. Try to spend a lot of time together, so that he can truly understand who you are, and then they will surely see the true goodness of who you are, not live fancy, a completely different person.
Did you know that guys are attracted to girls who are always smiling, happy, and have positive thinking? Especially girls with funny characters who know how to talk. So in order to win his heart, the thing to do is to always smile at him.