I know it hurts like hell. Feel every pain, endure it then let it go. 

Here are three ways on How to Move On:
1. Cry, cry and cry. Let your emotions out. Let the pain go. Feel it. 
2. Acceptance. With or without a closure, it is really important to accept the way things are. Even if it's not the way you wanted it to be, you have to tell yourself that it already happened. 
3. Distract yourself. Learn to paint, to cook, to play an instrument. Talk to your friends. You can also learn a new dance or a cover. But never, ever stalk your ex through their social media accounts or getting an update from one of your friends. It won't help you, trust me.