I know how you feel. I broke up with my boyfriend 2 years ago and I still cannot get over him. I love him and still want him back. All I can say is if you have found a great love, don't let it go too easily. All I want is my ex back and I know that it will never happen. If you and your partner still cannot work things out then the best way forward is to meet someone new and start afresh.
The past is the past and he is the past that broke your heart. Long term relationships are the worst. I know that you know that everyone knows that, that's why its so hard and I don't think that anyone ever really loses the feelings of the ones they love but it doesn't stop you meeting someone new. And you will in time.
Let all your emotions go out..try to preoccupy yourself with friends and family..and learn slowly to accept what has happened... learn to love oneself.
Eat a whole gallon of chocolate ice cream and cry your heart out and the next day wear a flirtacious outfit to your ex's place of work and lick your lips deliciously and he'll ask you back out again and you will get married works for me every time.
Try doing things slowly.... it takes time to grieve and get over the loss. Don't rush and try to be easy on yourself.
Stop being sad and move, or move away, or go away on a vacation.
Its very hard to get over a break-up. If you are the one who broke up with her/him and now you want them back, then tell them you made a mistake and you still have feelings for them. If you are the one who broke up, stay friends and let them know you still care. Just remember break-ups are never easy. In time, you will get over it.
Just accept the fact that it's really over. Don't assume that things will rekindle. You have to toughen up to survive in this world. There's a time for everything, so for now you just move on. Believe in the future. The future will hold something better. Move on. Move on. Move on
You should take time out for yourself to ponder over the relationship to be sure that you really want to break up and why you feel the need too. If you come to the conclusion that there is no hope...