With the lights into Jerry's face, it was difficult to see, the music and the people talking were new for Jerry, he never been to a party, and all this was starting to make him panick. He had come with you, just because you promised to be with him at the party, so he wouldn't feel alone or lost, but now, he's not able to find you. When he finally found you, you're on the table with the food and the drinks, talking to a random guy from the party, when Jerry sees this, his smile vanishes. That guy is really flirty right now, and you are not stopping him.