Oh, I didn't been here long time, but I guess my new tips will give you inspiration for more romanticism in your relationship!
Have you ever heard about "time capsules"?
Yeah, I mean those boxes which some people or organisations dig into a ground for next generations!
You can try that too!
Prepare some box, your pictures together, some other souvenirs connected with your relationship.
Find some romantic place, for example in park near to lake and put it into ground together.
When some big anniversary will come, discover your past together.
This way you get not one, but two happy moments together!
Just don't forget where did you "hide" the box ;)