No matter how close two people are, their relationship isn't composed solely of positive emotions.

Of course, the majority of emotions between friends are positive; otherwise, they wouldn’t remain friends.

Negative emotions between friends are usually subtle and insignificant, small enough to seem petty if voiced aloud.

Take, for instance, two friends from different countries watching a soccer match.

Even if neither of them typically cares about soccer, the moment their respective national teams compete, they automatically become their country's loudest cheerleaders.

Winning or losing the match doesn’t result in any substantial gain or loss, but emotions run high nonetheless.