It's hard to rationalize the irrational but you can't help but think "I want my ex back!" You want your ex back even though you've had your heart broken and your ex has ditched you for greener pastures.
Can you think of a worse form of torture than the one you're experiencing right now? Perhaps what you should be asking is "How can I get my ex back?" How can I make them WANT me again?" But is it impossible? It is too hard? Have they hurt you or you hurt them enough that you're unsure if you can get them back?  Getting your ex back is not rocket science but most people screw it up because they fail to understand the 'correct' way to handle a break up.
Yes there is a correct way and an incorrect way.
The correct way puts the power back in your hands and opens the door to another chance with your ex.
The incorrect way might mean never seeing or speaking to them again.
Which path are you headed towards?  How many of these do you recognise:

• Calling/txting/instant messaging them repeatedly to try to explain yourself or get them back or tell them how much you love them.
  
• Doing the above while you're drunk/high/emotionally tear-ridden
• Feeling the urge to spy on them, or ACTUALLY spying on them whether online or offline
• Doing things deliberately to hurt them or make them jealous.
  
• Trying to talk to their friends/family to see if they'll leak some information about your ex.
   
• Sitting around the house sad and depressed all day

 Sound familiar? No don't panic if you recognize some of these behaviours.
It is rather common because most people just do the first thing that seem the most logical to getting their ex back.
But the truth is, it is NOT the right way to go.
Want to know the correct way?