1 year anniversary, BIG HELP, ideas? help (:?

So my girlfriend and I have been together for 7 months now and im still decided what to get her on our 1 year anniversary, which is in December. However, her birthday is also the day before and Christmas is 3 days after. Could you guys give me ideas on what to get her? Something sentimental and not too pricey, as i am still in high school. It cant be big because our parents dont know that weve been together for this long. I rather not flowers or chocolate because they are too mainstream. Cheers :)