I know the feeling, sometimes it's ok to interrupt people. You just need to practice the 'conclusive' tone of voice and say something appropriate, e.g. "Well, I

I know the feeling, sometimes it's ok to interrupt people. You just need to practice the 'conclusive' tone of voice and say something appropriate, e.g. "Well, I guess that's just the way it is" ... pause ... "Good talking to you!"