Such situations contribute to distressing thoughts. The source is also the dire need of love. If now things can't go according to how you want what choice remains with us is to accept it and move ahead. But easier said than done. The dire need of love and specially from the same person is root cause of much distress. See a psychologist and work with him on the difference in need and want.

Dear friend You are lucky to experience this shock, pain and pleasure are two great teachers of life, My brother is army officer in pak border,when suddenly email does not come my family members cry ,assume some war is going on he, he will be captured and tortured by enemies, this story going ofor the last 10 years. he is absolutely safe. can cry can change the war ? No why to invest on time on which i cannot change? you cannot change your friends marriage can u /

The end of a relationship often feels like the end of the world. After all the time and energy you have invested in it, it is very painful when it gets over. Keep in mind that life is full of ups and downs; nothing is permanent. The pain you feel today will go away with time. Give yourself time to heal. Give time, time. In the meanwhile don't isolate yourself from your friends and family. Confide in someone you are comfortable with. Make a list of life goals, and plan how to achieve them. Relationships are an important part of your life, but they are not everything. Spend time with those close to you, indulge in some enjoyable activities. Keep yourself busy. Slowly you will see that there is a lot to life. However if you are feeling suicidal, consult a psychiatrist immediately. Don't wait to feel worse.

Yes dear,  it is difficult to accept such unexpected changes in life. And yet, I want you to consult a psychologist in your city personally to share your emotions to have a clarity and to handle these tough times.