Gifts have a way of making the receiver feel obligated, particularly when the giver has romantic intentions. If you like this girl, ask her on a date instead. Then, she can either accept or decline. Leave the gift-giving for a girl you are already involved with, or for people who are sure the gift will carry no further expectation.
(P.S. - i am not a "young" girl anymore, but I am still a woman, and I remember being young.)
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?