Things happen. They always do. You had planned otherwise but Allah subhanahu wata'ala has planned better things for you. The brother may have all the qualities you were looking for but it just didn't work out. Or that degree you worked so hard for didn't land you a job. It is possible that someone, with whom you planned to stay forever and raise children, left you stranded. Maybe you have difficult parents who just do not understand. Funds might be lacking and there's a household to run. Grades are not what you want them to be in order to get into a certain professional school. Someone dear to you passed away or you just lost the “apple of your eye”, your little angel whom you had to bury with your own hands.