My heart's been broken so many times that it's more like a little pile of bits than a coherent whole. True love's the hardest to deal with when it's taken away, but you just have to take a step back and put your energies into something else for a while. It's just a grieving process really. You never really stop loving, but eventually you come to terms with your loss and can begin to think about moving on.
My advice would be to go out and spend some money on pointless things for yourself and to steer clear of listening to music for a while. In your current state, even the lyrics of the worst song in the world will seem apt. It's best to devote as much time to yourself and getting your own life back on track as possible. If he wants you back, he'll come back. You can't dwell on what you did wrong, when in truth it probably wasn't anything you did which caused things to go bad.
Above all, try to keep going and spend time with your friends. You have plenty here.
