Ask my boyfriend to Sadie Hawkins?

I've been trying to find cute ways to ask my boyfriend to the Sadie Hawkins dance. i know everyone else just says that you shouldn't be too flashy because he might say no, but he's my boyfriend he wont say no lol, also he's a football player so if i could tie in anything with that. my friend is going to toss her bf a football with the question on it and i have no idea what to do. please son't say just flat out ask him, because we're not that type of couple... more cute like. We both also have this connection with music like lil wayne and drake. help please? i know his locker combo and everything.