Peevishness is crankiness or irritability. Your constant peevishness might make it difficult for you to make friends.
If you're having one of those days when everything seems to irritate you, what you're feeling is peevishness. It's easy to criticize other people's peevishness — like when your sister snaps at you for chewing gum loudly and criticizes the way you eat your food — but everyone experiences it from time to time. Peevishness comes from the adjective peevish, and its origins are a bit uncertain. What is known is that the Old English root, peyvesshe, means "perverse, foolish, spiteful, or insane."