Help, I'm being stalked!

[Geggy]

I am wondering what are some of the characteristics of a stalker? I would google this topic but I figured I would rather post in here and gather answers from you guys. I don't mean to brag but I am being stalked by a woman myself. It's quite flattering, at the same time, it's creepy. After countless times of telling her, let's call her Heather, to scram out of my life unless she'd lose some (ok a lot) pounds then I wouldn't have minded, but she wouldn't relent. So I had no choice but to block her name from my buddylist on AIM yet she knew I had blocked her name and she'd create new screen names to continue to harrass me. She also would send threats via email, stating that she would kill anyone who was seen holding hands and laughing at jokes with me. I've heard people saying "Oh, look at that poor guy, he's being stalked...again. You can't really blame him, I've seen his ways with women. They can't resist his charms and youthful smile. If I was a woman, I'd go crazy for him..." What should I do...?