Replying to 1 year anniversary

So my girlfriend and I have almost been dating one whole year.  whoopty doo, but shes way into it so ya.  I mean I love her dont get me wrong but its just not that important to me but I understand that it matters to her.  SO I need to do something creative and romantic and get her some kind of sentimental gift, you know what girls dig.   Any ideas would be much appreciated, and any thing that makes me laugh is also good.  And im kinda almost broke so lets keep it under a hundo