Heartbreak is a horrific feeling and seems impossible to ever get over. But it can be done. Keep busy and time will take care of the pain. It seems impossible but it is true, it will get better with time.
And don't get involved in self-torture; listening to your old favorite songs, or reading old love notes. That will only make it worse. Don't do things that will cause you more pain. Accept that it is over and move on and eventually the pain will go.