Lyric discussion by guinness_ 

Cover art for Old Haunts lyrics by Gaslight Anthem, The

Personally, I think it's about two people who were in a relationship (could be love, but could also be about friends) and who are obviously not the persons who they used to. They're holding on to things of the past, while it's clear that it's over. The whole song is about holding on to what has been, even though it makes you misserable. I think the point Brian's trying to make is that you, at some point, should let it go. Sometimes things are over and you should just accept it and not try to stay in the past.

It's quite clear in these sentences: "And don't sing me your songs about the good times, those days are gone and you should just let them go." Don't keep on talking about the good days you've had, 'cause they're long gone. If it's over, it's over. Stop lying to yourself and let it go.