What should i do about my gf?

Wow, thats pretty harsh... I would be furious if a loved one did that to me.... I knew a girl in highschool who told everybody she had stomach cancer and was going to p away within 6 months time... Her sister moved to town and attended the same school and let everybody know that her sister was lying. I was really upset and dissapointed. I spent alot of time worrying about her and hoping for the best... But I can't even imagine what you must feel like, Thats a pretty low blow for her to have done that. If you love her so much, you should tell her straight up, " No more lies or it's over" You can't stress yourself over her actions, even though breakups are hard, you will feel better in time... Do whats best for you. Good luck