How can I drive my girlfriend crazy?

Well, I've got a problem. My girlfriend drives me crazy. She knows that I miss her all of the time, and I always want to be with her. She knows that I am VERY attracted to her and that I'd do anything to get her. She knows that if she wanted to, she could have me whipped and wrapped around that little finger. Now that's all fine and dandy, 'cause she's a really good girlfriend, and doesn't abuse those things I listed above. However, I'd like to be able to make her feel the same way. Make her miss me, you know, always want to be with me. Not that I'm going to make sure she never does anything else besides stuff with me. I just want her to be as crazy about me as i am her. I'm talking things I could do to drive her crazy. Hot stuff. And not just heat of the moment stuff either. Things that'll make her WANT me. You know. So, girls, what makes you crazy for a guy? What could I do? What parts of the body do you find hot (not just the whacker)? Give me some tips.