Should I tell her how I feel, or give up?....................?

Ehhh.... thats tough. I mean shes "married". The best thing to do is tell her. Even though chances of her getting a divorce and ending up with you are very slim (divorce is a HUGE thing) its best to get it off your chest to have her at least know for sure how you feel. Don't let it ruin your friendship. A situation is only awkward if you make it awkward.