What you are suffering from is very similar to a bereavement . Accept that the loss of love hurts, no matter how it is lost and give yourself the time and space to grieve and mourn its loss. Be kind to yourself.. If necessary give yourself a short space every day for some tears in private. But remember that, hard though it may seem now, the future still exists for you and allow yourself to open up to new friends, experiences and opportunities. Try to do one positive thing every day. As somebody else has advised, keep yourself busy and active. Join your library. Start a new evening class, take up a new hobby. Write a daily diary of your feelings and every day give yourself marks out of 10 for your level of unhappiness. I hope that in six months time when you read back on earlier entries you will find that your unhappiness level has reduced remarkedly.