Subtle expressions of love?

Make her favorite lunch and put it in a brown paper bag. Leave a love note inside, nothing big, just something like, "The day never seems as long when I know the night will bring you back to me." Put in some Hershey's kisses as a surrogate for the "real thing" and either bring it to her at work/school or stop by her house before she leaves in the morning to drop it off. Girls LOVE stuff like this because it shows that you cared enough to make an effort.