One thing I have noted is many men tend to say that the lack of companionship, a lasting love, is the primary factor in suicide, and that if they weren't so lonely, they would want to live. I feel this applies here. He wants to die only because you want to die. If he was suicidal before, it was much more passive - the revelation of your loss activated it. He would likely opt to choose a long fulfilling life in which he was able to love and care for you.
This may seem unfair to you, but in essence you choosing to end yourself, is heavily influencing his decision to end himself. In a way, by choosing to kill yourself, you are choosing to kill the one you love, who would have chose life if it meant living it with you. You are his purpose and he has decided he does not have a function without that purpose.
This is where relationship dynamics become tricky for those who are suicidal. It is an unfortunate biproduct. Those who are alone/lonely and don't have a significant other, especially one who is suicidal, can more accurately make the decision for themselves without outside influence. I think in this case, I personally would choose to bear the weight of existence, to protect the one I love, as I wouldn't want to be responsible for their death. In the end, only the individual can decide what they are willing to bear, and their life is their own to live or die as they wish. It is just a shame that our decisions can influence others. I hate the idea of breaking someone I love, and having them follow me in death. I bear a guilty enough conscience, I do not wish to take someone, who means so much to me, with me when I go. I would rather be tortured for an eternity, just so they could live a single good lifetime.
