When a change is necessary, it's necessary. Today, the truth will become too obvious to ignore: and you might see that it's calling you to make a big change in your life. If you really want someone just to go away today, you will have to stop ignoring them. It might sound counter-intuitive, but it's not. The silent treatment doesn't work, and avoidance is just unpractical. Until you face things head-on and are totally honest, you will never achieve the closure you need.