I'm in the same boat as well. I have a wife and me dying would be painful, but she can move on I believe pretty easily. We've only been married for a year and known each other for 3. Some days the pain outweighs the guilt and vice-versa. I self-harm on a weekly basis, and I've been concussed for a few days after bashing my head into the wall several times. I also work a regular job which keeps me sane, but I'm also on this forum during the job.
I don't think I can CTB unless I cut off all connections. If you loved someone you let them go if you're gonna CTB. Divorce or file a living will. People move on in certain ways, some get over it, some harbor resentment or guilt for not helping you enough. It all depends on how they deal with trauma. Your death will cause trauma in him, especially if you guys stayed married. I may divorce my wife so she can easily move on from this and I know she would feel like I cheated on her or something and would hate me rather than staying married and CTB, then she feel guilty.