The context of the following conversation is Taylor gave Alex a ride home from the dance because Alex was too drunk to drive.:
Taylor says The party last night was wild..
The friend responds Oh yeah, are you hungover today?.
Taylor responds No, I decided not to drink at all..
The friend responds Oh yeah?  Were you the designated driver?.
Taylor responds Yes, in fact I ended up driving Alex home because he was too drunk to drive..
The friend responds That's good, I'm glad everyone stayed safe..