i feel this as well. i see how terribly it hurts my partner to deal with my constant suicidality and not knowing if ill be there to answer him when he wakes up in the morning; he tells me how horrible it would be for him if i killed myself. but given that ive always been this way and dont foresee it getting better (and neither of us will leave each other), surely it would be better in some way to end my life now rather than subject him to 10, 20, 60 more years of this bullshit. i cant undo the damage ive already done by becoming a part of his life to begin with, but i can mitigate future harm by allowing him to begin healing and moving on.