Here are some very easy and simple ways to show off your romantic side.
Offer a back massage with some good smelling lotion.
Make a CD with a few songs that are meaningful to your relationship.
Surprise her at work and take her out to lunch, maybe take-out food in the park or maybe to a little diner, for a midday romantic interlude.
Send a text message or email that says "I love you!"
Leave a love note in her car telling her to have a great day.
Write a love poem for her.
Buy some body paint and write your love message on your body.