I hope it gets better for you and your hubby soon. I can only say from what I have felt.
Everyone thinks about dying and going away, this is normal. Some people like me make plans when not quite there to expedite the process and start thinking it is better that way. Like constant thinking... In my case driving direct on with a semi tractor or worse yet.. popping pills. It is very good of you to realize your partner is depressed. I would force help, if you are so worried. I have been to the bottom of this illness and struggle every flipping day. Huggles to you <3