Well incidents like this can take a heavy toll on the mind understandably, but as you have said that the case is too old and further you also love her. So taking into account these points why dont you look for the positives rather than rewinding yourself? Again this may sound harsh but if you have an intend to take a revenge or anything sort of this then you can find yourself another woman with whom you can have an affair just to make her feel. But still this will not be a good idea, things resolved mutually will benefit both I feel.