Yes- You can actually begin your life a-new. You are now the King of your castle and have to answer to noone. Don't get down on yourself, it was designed a long time ago for this moment in your life to happen so take it for the lesson that it is going to teach you to make you smarter. You may have loved her with all of your heart, you will get rewarded for it in the future, and whatever the reason for the breakup, you have learned that there is a piece of you that needs nourishment to be a better lover to the lucky woman who is just around the corner.
Dont fret, your life is far from over, your new self is just being born.