You may have trusted all of your hopes, and dreams into her at one point. It sucks to realize that none of the things you planned on are going to happen. It hurts even more to realize that your ex wasn't the person that you once thougth they were.
I was just dating a man for a yaer, and we broke up 5 months and I was devastated when it ended. I found him to be an abusive, lying, bastard.
But, one thing I can say to you is that you will get over it. Just give it time. Believe me, time heals everything. One day you will not even remember the pain or her for that matter.
Just remember that the love you had for her, can be found with another woman. So don't feel like losing her is the end of the world.
Best to you.
Here: answer mine:
http://answers.yahoo.com/question/index;_ylt=Asow5ivFvbNRV8gh8LmMr6fsy6IX;_ylv=3?qid=20081210183006AAfSvpV