I'm gonna throw a curveball for a second here and say the whole "showing versus telling" advice is a tad overrated at times. I probably hear/see this particular tidbit of advice more than any other and it is definitely a modern style, to pad interactions with showing, especially when it comes to emotions and emotive scenes.
Now, hear me out before you tear at my juggular. Showing versus telling is sound advice, like everything, up to a point. That said, it is important to note that being to-the-point and telling can often make the most realistic sense and depict a more genuine thought process and reaction for a character.
For example, if I know a person well enough, I will be able to determine if someone is mad simply from the sound of their voice, the tone, or even just knowing that whatever has occured will have definitely annoyed them - or alternatively, I may know they would love this and they're happy without having to survey them at all. My brain subconsciously picks up all the tell-tale signs, I'm sure of it, but my active brain is absolutely not listing the clenching fist, the furrowed brow, the tapping leg for every reaction. In fact, I might consciously only notice one.
It is perfectly fine for a character to note that the other "was fuming/mad" or that they themselves - being able to recognise their own thoughts and feelings more intimately, would absolutely think "I'm pissed off about this!"
This is especially important when writing in closed-third or first POV. You don't need to ramble off lists of body language when a person can determine/recognise emotions more simply and directly. It can read more naturally, without bogging anything down.
Showing is great, it really is. It colours the prose, but it can drag and plod when characters aren't direct in their thoughts and their feelings. You want your characters to feel like people, and people are, more often than not, painfully self aware. Not to the point that they are listing every minutae micro movement, but enough to have awareness/understanding of a feeling, a person, an emotion, especially in reference to themselves.
"He was furious" is sometimes better than the long, running sentence of "his face burned, fists balling at his thighs etc. etc." Direct and punchy manner of thought can be bloody good when used well.
Just, don't get too tangled on the show versus tell rule, to the point of over-saturating your story with it. Balance is key, and both have their place. Sometimes telling over showing is the best way to go! ❤️
