Boy thinks I like him!?

Okay so this is gonna be semi long/ confusing. I noticed this boy at our local basketball gym and well they do leagues and one is men's and like all my cousins/uncles got together and put a team in so I go watch them and this same boy I noticed there has played the last couple of games with my family and well I thought his name was Mike and my cousin thought his name was Dylan so her mom sent her to ask him (she's 13 btw & im 19) well he stops her on her way back and goes "who wanted to know" and she points at me and her mom and he goes "who?" And she points at me and goes "Delaney" and like he's been weird the last few times and I think he thinks I have a big ass crush on him... like idk what to do? Should I say something?