This right here really spoke to me. You seem like a very reasonable, understanding person. It's unfortunate that you are dealing with all of this. I know from personal experience that being around negative people can suck all the energy out of you and make you not feel like yourself! And I totally agree. Life is short and you deserve to enjoy as much of it as you can!

I would maybe suggest couples therapy, or try to understand why he's being so negative, although I imagine you must have tried one of these options given that he's been this way for 20 years. I don't know if this particular instance was especially upsetting for you, but maybe try to express how much he is hurting you. And if he doesn't listen, well, spend more time with your dog (I'm gonna call him your dog because he doesn't seem invested at all)!

Also, welcome to PC.