The City Lyrics

Lyric discussion by bubblegumteens 

Cover art for The City lyrics by 1975, The

I think that this song is about a pair of friends who sleep together: she wants to find true love, and he's content with the arrangement, but it causes them to argue. That's the first two verses.
The second two verses are harder, but I think they're about the men she's been going on dates with on her search for true love, and he mocks them.
The first guy has had a string of odd jobs and is directionless.
The second verse is maybe a doctor, considering the part about the MD?
The narrator, I guess, is realizing he's in love with his friend who's convinced she needs to find love elsewhere instead of looking for it in him. The narrator grows detached, and she is concerned, but clueless.
I'm beat on the part about the brother.