Okay let me start by saying I can't see your email address.
Have you checked out our profile while logged out or through an incognito window? If you do I am pretty sure that you will see that your email is not shown.
Second, if you are worried here is what you can do to make sure that your email address is private:
1. Go to your profile
2. Click the wrench symbol on the top left
3. Click "Privacy" under Settings
4. Change the privacy to "only me"
5. Click "Save" at the bottom
Now your profile is private if it wasn't already set that way.