Help needed Fast Plz! (10Pts for best plus will answer yours)?

Ok well this Girl I like who I think likes me back but I'm not sure pretty much invited me to her dance perforrmance! So I'm thinking of bringin a rose with a tag saying you were great and giving it to he after! Is this a good idea? What should I do or say? What should I wear? Thx a ton to everyone who answers this!