Well, yes, Alma explains that she figured things out about the fishing trips, the note, etc.
But, also Ennis is now worried about "people on the pavement" looking at him "suspicious" like "they know." I do think Ennis is worried that folks are somehow able to figure him out by the way he looks (or something like that).
I definitely think you're right that Jack simply lives without at much fear as Ennis, even when it comes to the issue of sexuality.
I agree, however there is a revealing sentence in the story that I think indicates Ennis has been giving some thought,albeit abstract to how the 2 of them could be together.In the motel scene Ennis says "I goddamn hate it that your'e going to drive away in the mornin and I"m goin back to work.-----"shit I have been lookin at people on the street.This happen a other people? What the hell do they do?"Is he looking to Jack as the more experienced to provide him with the answer?
It seems that Ennis must have some inkling,no matter how primitive or buried within his psyche that others have experienced what he and Jack have.He must have come at least partly to terms with his own feelings,otherwise why does he ponder what other people do. Interesting too is the fact that he has been thinking of this in the 4 years before he meets up with Jack again.
Equally revealing is jack"s reply ,'I don't know what they do,maybe go to Denver.'and I don't give a flying fuck"So if Ennis was hoping for some solution from Jack he is gravely disappointed,Equally puzzling to me is why jack mentions to ennis that he thinks they may have been seen that summer.Hardly the way to quash any fears inherent in the deep recesses of the mind of Ennis.
I think for Jack the place is irrelevant,he just has a pipe dream of some utopia where they can be together,period. Ennis has obviously given some thought as to how others manage it.A point which seemessd at odds with his normal laconic self.Maybe the same can be applied to him as his daughter,he does not say much ,but what he does sure is telling.
I think one of the most poignant sentences in the book is when Ennis reveals to Jack that after they come down from the mountain and he was sick,"took me about a year a figure out it was that I shouldn,t a let you out a my sights.Too late then by a long,long while"So he had been searching for answers for a year!!
My interpretation then is that Ennis gave up when he realised why he had been sick,and yet could not silence the nagging doubts as to if it happened to others ,what did they do about it,Jack of course is flippant in his "go to Denver" What puzzles me is when Ennis is for once being painfully honest and revealing his innermost thoughts,why does Jack not jump at the opportunity.Is it that he is still processing what Ennis said about it being too late by a long long time?
Well those are my thoughts and feel free to disagree,I think Texas is maybe as throwaway as Denver.Fundamentally I feel they both realise the ship has long since sailed.Having realised that ,all the frustrations of the years erupt.
Sorry if I have digressed a little,I just thought the motel scene in the book maybe casts some light on the film scene.