Most Helpful Guy
No it would not be a good idea. Wait for your first kiss to be special something that he will happily give you when your ready. It is not weird to like your best freind but don't try and get a kiss out of him that way. If you want to use that line ask him out on a date or an outing and afterwards try using that line on him. But say is sweetly and lightly to him in his ear while you two are walking back to the car.
Most Helpful Girl
I think it would be weird if he really has no idea you have those feelings for him/if he doesn't have those feelings for you.
I would clarify that first before asking that out of nowhere, and even if he said yes, are you willing to risk the friendship for this kiss? Because things could get complicated after asking/doing such a thing with your best friend.