It's time to give that horse one last lash and let it rest in peace. At this particular moment in time, it will be far easier to get mad and stay that way than to forgive and forget; but that doesn't mean it's the best thing to do. In fact, if you're really still interested in keeping things together between you and the person you've been feuding with, why not lay all your cards out on the table, be totally honest and get the problem solved once and for all?