I agree with your premise as to how effectively work out a relationship. However, none of these actions have occurred. Perhaps, this is all that's needed to dispel the
possibility of eventuality in their actions. Restraint is
already in place. The scenario expressed is in one's imagination only... that "If only one could... " ~ true enough that it could be playing with fire... still all feelings should be honoured and accepted... and then dealt with.
The only time true denial enters the equation is when a spouse or partner is not informed of what's going on.
Is this to suggest that the one partner inform the other partner that it's possible to still love a prior spouse or partner, even though the relationship itself didn't/couldn't work out, and that one wrote a poem to address these feelings? Or, are you suggesting that the perfect model of human emotion be employed and adhered to... and all emotions thereby be compartmentalized... past tense-no longer relevant-delete. What safety that would bring, with that process already having taken place, even the fleeting thoughts would never occur. Where did you purchase your brain and heart? I'd like to get one of each, ones that would be far more compliant than my own.
Denial can also take place after a spouse or partner
has been informed, by another party.
By the time these two are sixty-four, they'll already be flogged and pulverized into oblivion.
Perhaps, you could congratulate the writer for having taken the first step toward resolution of his current relationship. To recognize and acknowledge that one's love continues in another direction is necessary before taking action to resolve issues with the one you're with... or to determine to dissolve that relationship.
However, sometimes, as well... things just aren't so ideally compartmentalized as you seem to suggest. There may remain a romantic love, an ideal, with the previous partner... yet, the day-to-day reality may not be feasible because of one or both of their personalities. The current partners may be much more realistic in that regard. Still, what does one do with the lingering reality of that love that once both invested in... seeing one another again can reignite that. Then, going away, one is left to deal with that onslaught of new/old feelings, before settling back into the current relationship. Is it really a sign that the current one is bad... or is it a sign that there was a vibrancy in the original that time has not faded? Yet, it could still be that it remains unworkable to attempt life again as a couple. So, what does one do? Write a poem of desire and a fond remembering of their love.
~ Lizzy