Answer:
The personality structure represented is the Id.
Explanation:
According to Freud, an individual's behavior is determined by the inner conflict of the 3 components of the personality structure: Id, Ego, Super Ego.
Let's break them down:
In this case, the Id is taking charge since your friend is showing you the desire and urge of going out to drink and have fun, even if he has responsibilities for the next day.