Actually, you could stand to bring out your playful side a lot more with her. You've done more than enough penance... time to have fun with her.
When she turns you down for sex, just say "No big deal... I'll be at my computer if you need me" with an evil grin on your face. You're not coming out and telling her, but you're not leaving much doubt either, and if she doesn't like it, well she knows what she can do.
a fine and enviable madness, this delusion that all questions have answers, and nothing is beyond the reach of a strong left arm.