Did you tell her yet? I hope you dropped her ass. Unfortunately, you don't even really have a choice. Think about it - you'd lose respect for her if it were the other way around and she took you back. Tell her flat out man, it's done. Go off and find someone else. You will not regret it. Never met a guy who dropped a girl like that and did regret it. You'll like yourself so much more in a couple months when it's all said and done and you've moved on.