How to be more flirty to get him back?

Hey I'm Mexican I rite now I have a crush on this black girl but if you really like him just let him know that your interested smile at him(and no it's not stupid) just do it believe me You have to let it be known that you like him or else he won't know or just tell him right out the back that u like him flirt with him and sure he'll start to flirt rite back with you good luck :)