Hi Malleus,
sorry to hear of your situation, I think you need to have a chat with your girl and see what she has to say about it when you confront her. Maybe she considers it a white lie because she isnt cheating, or maybe she is just dishonest.
I also suppose it depends how emotionally involved you already are in the relationship and if you have met already and have solid future plans.
Maybe i could forgive the lies if i genuinely believed they were white lies and nothing is going on, but i must say the trust would take quite a while to rebuild. i wish you all the best whatever you decide.