And he had, ironically, spent so long pretending that he could stand it - he turned up in conformity with Ennis's "rules" - meet a few times a year, way the hell out in the middle of nowhere - in a relationship that never moved on, and when he makes an emotional confession Ennis more or les ignores it and certainly gives no appearance of wanting to respond by changing anything, and doesn'r seem concerned that Jack is involved, as he is, with another women. When Jack repsonds honestly to the Mexico accusation, it's as if he's mentally prepared himself for total revelation, which may be the only way to get through to ennis how much he's suffered over theyears. Of course it may also do what he's been pussyfooting around all these years, frighten Ennis off completely, but maybe he's decided to take that risk or is so angry and miserble that he doesn;t even think of it. either way this is the crisis point they've avoided every time they've met from the reunion on, even from their first parting, and it's Jack who provokes it - ennis presumably would have gone on for ever as they were. So all this shows Jack's desperation and the corrosive effect of constant rejections, uncetainties, absence and all the rest.
