Ignore her. Start telling yourself that any other guy who wants her is welcome to her. She's a creep.

If you became a nervous wreck at work, you're kind of lucky you still have your job. Don't let it happen again. Pull it together. When you are at work, your mind belongs on your job. She is not worth it. This is why a lot of people avoid workplace romances.

When you look at her, remind yourself that, someday, she will be an old, over the hill broad. Then all her little games of enticing and rejecting men will be over. Then she will be kind of pathetic. By then, you may be with someone really worth having.