How can I do something romantic for my girlfriend? (see details)

At the moment, my girlfriend is away finishing her university. So doing romantic things has become harder.

To make it even more difficult, her parents can not find out that we are still together, as we are planning to run off in secret some time in the next few months and get married.

Does anyone have any romantic ideas, for things I could do, when I’m so far away and operating in secret?

We talk every day, and I have made an effort to still do some romantic things. Poetry, letters, self-made art, and so on.

I know this will come as a surprise to most of you that know me a bit, but under my hard exterior, some place in my little black heart is a lot of romance. Usually I am very romantic, and have a lot of romantic ideas, from unique to corny to silly. However the distance and situation has made it hard to be as romantic as I would like.

While we are only going to be apart another 4 or 5 months or so, I do worry that I am not being romantic enough, often enough.

Any ideas?