FOMO keeps you thinking about the party you’re not at instead of the people you’re with.

Wanting to be somewhere else does not get you there; it only takes your attention out of the room you are actually in and spends it on an imagined version of the other room, which is always better than the real one. Meanwhile the people in front of you are getting a half-present friend. The cost is not the party you missed. It is the night you were at and barely attended.

Try one evening with your phone face down and out of reach. Ask the person next to you an actual question. You can check what you missed later, and you will usually find it was fine.