Question about a possible prom date???

so i really want to go to prom with one of my guy friends ( we arent super close,but we talk alot in cl and stuff) but i dont know how to ask him, or get him to ask me...I would rather him ask me, because, well, im broke, and proabaly cant afford my own ticket right now (sad, i know)...how could i hint to him that iwant him to ask me???please help asap! tickets go on sale in like a week!!!!