Query
the friend you walked away from when things got hard
Bad Friend Rina Sawayama
The narrator names her own cowardice for walking away from a close friend in a bad stretch, and carries it.
Old Friends Pinegrove
Guilt for leaving a friend out of avoidance, arriving at the point where it is too late to fix.
The Freshmen The Verve Pipe
Two people walk away from a crisis out of plain cowardice, and spend the song refusing to own it.