You're both idiots. What exactly do you think is going to happen if she sets up a myspace account? I'll tell you, you'll get 5 or 6 spam emails from russian prostitute sites every time you log in. That will be the only real net change. It's not like there's some magic fairy out there who will force you to post intimite details of your life on myspace. Even if you do post personal information in a blog, there's some thing you can do to make it visible only to your "friends" too.
On the other hand, myspace is a garbage site that is only useful for bands and occasionally other etertainers. In that respect, only an idiot would want you to put info up there since the site is idiotic and horribly designed, and has way too many technical problems. Also, it's dumb for her to think you are hiding something just because you don't have a myspace account. See above, it's not like some demon's going to come and extract your brain matter and put it up on myspace the instant you sign on.
Edit: PS I'm still trying to figure out what the two email addresses have to do with anything. Seems like you need an editor to trim away useless information in your posts.