Awww, so cute! ^_^
Roses are so sweet, carnations would work too but then again I like flowers. Don't try too hard though, it'll keep you from enjoying yourself. She already said yes, so you may as well relax a little. Just be a good boy, kay? Besides, it seems like you are going on two dates this weekend between the football game and the dance so it seems that she's interested too. Keep us posted.