Crying over is an idiom used to indicate that someone is excessively upset or dwelling on something that cannot be changed. Some synonyms for this phrase could include: lamenting, mourning, grieving, pining, or fretting. Each of these words describes a state of emotional distress that is brought about by focusing on something that is out of one's control, such as a lost opportunity or a shattered dream. While it is natural to feel sadness at times, it is important to recognize when these emotions are becoming overwhelming and to seek support from others if necessary.