My husband and I own a small business together. He is always screaming and nagging me. I just ignore him because I know it is not personal.Sometimes I pull him aside and let him know when he crossed the line. Always approach your coworker in privacy, it is nobdy's business. Be open and honest about what bothers you and most likely if your approach is in a kind manner, they will listen and understand. After 12 yrs working together, practice these skills and the stress will ease up. Some people you have to just be firm, you can usually feel out the person to figure the best way to handle problems. GOOD LUCK! By the way we are still married and most of the time happy.