I don't know about the whole strangers thing, but I do know it is possible to move on. I don't think you could ever actually let someone go from your heart no matter how you act towards each other, but it might be best to look at this relationship as a learning experience. Even though it will be tough try to find someone new, someone who you can get along with 90% of the time. If your not wanting to go that route do you ever think you and her could find a happy medium together?