Let me first say that it is normal to cry. I was married for 11 years and it took several years for me to stop crying and thinking about him. It is not going to be easy to get him out of your mind, actually from my personal experience you may never get him out of your mind but with time you will think less and less of him and you will begin to have more good days than bad. The nights of crying your eyes out give way to days of laughter (Psalm 30:5 MSG).