There many things you could give...
Can Give:

Paper/Letter your feelings written on it. "Done This Before"

Necklace [b](note that it should be silver not something that rust)[/b]


"Done This Before"

Ring [b](note that it should be silver not something that rust)[/b] "Done This Before"

A nice and simple but sensational hug "Done This Before"

A sensational kiss "Done This Before"

Give Her A Chocolate "Never Dones This Maybe It will cause their teeth to decay"

Can Do:

Go out together and have fun "DOne This Before"

Watch Movies "Done This Before"

Talk about how much you loved each other"Done This Before"
I think I dint lost anything...