A Particularly Devastating Kind of Absurdity

I am particularly tormented by the dilemma of the immorality of confessing great distress and emotional pain... though I also see the comic absurdity.
Consider this scenario: you tell a friend, knowing that you are correct, that you have less reasons to keep existing than them, in both the sense that your death would be an extreme emotional burden to a drastically smaller circle of people, and also in the sense that your life (as you experience it, as a living person) seems to be a lot less actively pleasurable than theirs, since you lack certain things that they have (like companionship). How do we morally evaluate such a confession? Is it a moral or immoral thing to do? I submit that this is clearly a totally selfish act. It is selfish because it's the kind of thing - like confession of suicidal ideation or whatever - which makes the person being told, if they care about you a lot, really unhappy and really distressed. (And if they don't really care about you but care about you enough to not be totally callous, it puts a big burden on them nonetheless.) Such confessions may be admirable if you admire courage, because it seems fair to say that they generally require a high degree of courage: there are evo-psych-type reasons why letting down one's guard in the sense of abandoning the pretence of the falsely high status level is not an easy thing to do, and why the thought of doing so can bring on anxiety (especially for males, for probably evo-psych and social reasons). Yet, courage aside, the effect of such a statement is to place a tremendous weight on the interlocutor, and a drain on their time and emotional reservoirs.
Now suppose that - as sometimes may happen - the interlocutor replies to such a statement by feebly trying to dispute that claim or, even more feebly, simply making some expressive speech act in denial (either because they are being totally irrational and really think that you are stating a falsehood, or because they hope that you will be irrational and take their response seriously). Now, here's the thing: if you choose to treat the response as an actual attempted counterargument and demolish it, then your level of selfishness in this situation has only increased.
And, of course, if you point out to your interlocutor that it would be selfish for you to demolish their feeble response, even though you know you can, that is also selfish.

It strikes me as a very devastating kind of absurdity that when one is extremely miserable, telling the truth becomes selfish.
And let me just say that I know that this is a trite thought, like all thoughts.