UPDATE 2:
Asked another girl, got a yes.
Lesson learned: girls like songs more than cakes.

Thanks for the support, everyone! Id just like to point out that I am
NOT mad at or with the first girl at all. I admire that she at least had the respect to turn me down. I would rather go with somebody who wants to go with me as opposed to somebody who feels like they have to.
UPDATE 1: She said
NO (and not even directly!

) but I was lucky enough to have a plan B fall into my lap at the last minute, and as such, I will be taking care of that tomorrow. Since a cake is out of the picture, there just happens to be a little song I managed to put together in about an hour. ROUND TWO!!
ORIGINAL:
So, I was laying in bed one night trying to fall asleep when the idea just popped into my head. I eagerly roll out of bed, quickly jot it down on a notepad, and tinker with it for a good long while.
About six weeks later, I finally put it into action.
The end result? This.
On the outside of the box...
On the inside of the box...
Considering this was my first time using fondant and actually icing a cake, I would say that I did pretty good job.
The best part is that she is expecting me to give her a birthday present tomorrow. Whoops. Did I tell a little white lie?

Now, I just have to make sure the cake can last until lunch... Wish me luck!
The flowers were premade, btw...