I cannot help summarizing my above argument of the endurance of Jack's love for Ennis with a poem by the Greek poet Cavafy. In it, the protagonist, even in the midst of trying to forget a lover who has left him, cannot forget that love. In some sense, I think of Jack along similar lines.
In the Tavernas
I wallow in the tavernas and brothels of Beirut.
I didn't want to stay
in Alexandria. Tamides left me;
he went off with the Prefect's son to earn himself
a villa on the Nile, a mansion in the city.
It wouldn't have been decent for me to stay in Alexandria.
I wallow in the tavernas and brothels of Beirut.
I live a vile life, devoted to cheap debauchery.
The one thing that saves me,
like durable beauty, like perfume
that goes on clinging to my flesh, is this: Tamides,
most exquisite of young men, was mine for two years,
mine completely and not for a house or a villa on the Nile.
Constantine P. Cavafy