A heart break hurts like hell but time heals wounds and you will feel better soon. Trust me :).
Try to not thinking about past but think about future.
A world is huge and I think that somewhere is a person who is waiting for you.
It hurts but after time you get better, things are more clear and you figure out why it didn't work.
It's important to see the other person's mitakes too, don't blame yourself all the time.
Most important, you'll fall in love again and you'll even understand why it didn't work with the ones that came before.