[header] How to handle someone who is in a bad mood [title] Avoid allowing the mood to rub off on you. [step] Quite often a person in a bad mood will leave their mark on those around them. This is often in the form of putting them in a bad mood, as well. 
People who are close to each other often mimic each other's behaviors, which can leave you feeling cranky. Instead, do your best to stop them from affecting your mood.