it's four in the morning,
and the man you left is sitting on the barstool still in mourning.
he's trying to understand how you feel,
but it's really difficult to do since when  it comes to shots he's had his fill.
he wonders what he did wrong in the your relationship that from his perspective is "ours,"
and what you don't see as you walk away is that he feels remorse so he'll continue this cycle for hours.