talley, it's up to you. I tend to think it is courteous to wish someone a Happy Birthday with a card but that's it! Others may disagree. Remember, you aren't hating her, just giving her the space that she may need and that space may result in a renewed interest in you at some point. That space also gives you time to GAL and make a wonderful life for yourself so that no matter what, you will come out a winner!
