How do you get him back?

We don't have the ability or the right to control someone else. You can't "get him back" if he has moved on. Sometimes the best we can do is to learn from our mistakes and live your life, trying to avoid our past mistakes. patience and keep communication going. there is no fail-proof method but if it's meant to be staying friends can allow you to build back trust and a deeper devotion to one another.

_you dont want the stupid guy that left you, move on and ignore him, you'll find some one else._