I'm sort of at that point myself - I mean, if I ever want to get laid again, I'd damn well *better* be taking her to a rural B&B for Valentine's Day...
Next time, try gifting your intended with a vibrator and a Wholesale Club package of the appropriate size batteries. It is the gift that keeps on giving, and everytime she uses it, she'll think of you...or Ben Affleck. Plus, she'll know that you care about her satisfaction. Not enough to actually concern yourself during the eventual, hoped-for actual intercourse, but still, it shows that you care.