How can I get my prom date to like me?

So I asked my cousin's friend who I hardly know to prom. We don't know eachother well, but he's really excited for prom i hear. He even asked my aunt for advice on if he should shave his facial hair or how he should look and wanted her to help him pick out the perfect tux, like he's wanting to look his best it seems. He could've cancelled cause he has a baseball game, but did alot of talking to get out of it. Today I went to my cousins baseball game and he sat by me...after the game he hung out with us and my cousins kept grinning ear to ear at me and one of my cousins made a heart with his hands lol. From spending the day with him, I kinda have a thing for him now :P. I want to make him like me at prom, what should I do?