The grumbling and whining of a co-worker or friend is starting to get on your nerves, so now might be the time to take them to task and tell them what you think. Unless you address this situation head-on, it will only grow and become a larger obstacle between the two of you. The good news is that the sooner you have the conversation, the sooner the issue can be resolved. Start early and get it over with. Be as compassionate as possible, but tell them to stop.