Have you tried approaching him when you're not currently upset and discussing it with him then? From what I'm reading here it seems like any discussions happen in the heat of the moment when you're not feeling well and that may cause him to just brush it off. I have had some luck explaining it to people who genuinely cared for me when I was in a decent mood and able to fully explain myself without emotions driving me, but not everyone is receptive then either. Some people just don't get it if they haven't been through it. Try metaphors too. I'd recommend the one that was recently posted in the Depression forum: https://forums.psychcentral.com/depr...epression.html

If you are unable to get him to understand, I wonder if he would be willing to go to a counselor with you and maybe they could explain it to him? Or maybe someone else who replies will have more ideas for you. Above is just what has worked for me. I hope he can learn to be more understanding.