Having your wedding cancelled can be the most devastating experience of your whole life. It puts you in a very embarrassing situation, and you have to deal with a number of adjustments such as facing a failed relationship (if the cancellation is caused by break up) and facing people's queries and curiosity.
Whether or not you were the one who called off the wedding, you have to realize that your life is making a sudden and unexpected turn. Brace for the consequences, but be very strong. After your wedding has been cancelled, try not to sulk in one corner to cry your heart out. Mourning can wait. In the meantime you have things to look after.
Right after your wedding date is struck from the calendar, settle the nuptial arrangements you have already made. Get in touch with your wedding planner or coordinator to help you in this task. Your aborted groom or bride can also help in this matter, notwithstanding who is the guilty party between the two of you. This is not the time for putting blame on each other, not yet anyway. If you want a confrontation, go ahead, but not until every detail of the wedding has also been cancelled.
Resolve everything from the reception reservations to the flower arrangements and your wedding ring jeweler. Inform everyone that you have contracted for the wedding. And depending on how early or how late your wedding is called off, you may be obliged to bear certain portions of the reservation expenses. But without any complaint, make the necessary payments, as you don't want to be hounded by bills way after the cancellation of your wedding. The last thing you want is to later on deal with accounts that remind you of your cancelled wedding.
After everything has been settled, then it's time to let go. Cry if you must, but do it briefly. If you prolong your grief, you will get stuck and depression might sink in. There's nothing worse than a dejected bride or groom in a depressed condition. You should not ruin your life, but instead try to spring back quickly and go on with life.
If you think friends and family can help you boost your downtrodden morale, have them surround and protect you. If other people (particularly the nosy ones, not to mention the gossipers) see that you have support from family and friends, they will step back and will instead give you the peace and privacy you need after the cancellation of your altar date.
Facing your fiancé is the next step you will take. If the reason for the cancellation of your wedding is a mutual arrangement, things will not be as complicated, and an amicable settlement is within reach. However if it's your fiancé who broke up the engagement and you are the aggrieved party, try to be as civil as possible during the confrontation. Avoid being bitter, because if you do, the experience will linger with you for a long time. The best thing to do, is face everything squarely, be as forgiving as possible, and move on with your life. There may be better things in store for you than the marriage that never was.