Moods spread through a friend group faster than a rumor. Decide what you’re passing around.

Feelings move between people quickly, especially inside a close group where everyone is reading everyone else. Whatever you walk in carrying tends to set the level for a while, with nobody consciously deciding to adopt it. That is not an argument for faking fine, it is a reason to know you are contributing something either way.

Notice what you usually bring into a room and whether you would want to receive it. On a genuinely bad day, say so plainly rather than spraying it around. When you do have capacity, lift the level, because that travels just as fast.