My husband didn't get it for a long time, and thought it was just depression (which he also does not understand). He kept saying I need to do what I enjoy, make something of my hobbies, kept implying that I needed to find a job - I was offered my PT dream job, as soon as he lost his job, and moved us out of state to work at HIS dream job (he's the breadwinner, so we go where he can work). So along with my family, job, and health, I had to leave everything behind. I finally told him that and laid a huge guilt trip on him during one of our screaming matches. Shut him up ever since
On a more serious note, though, it takes time and a lot of education. Like others mentioned, find a way to see "Under Our Skin" and watch it with him. There are so many articles on the internet about
what Lyme & Co does to your mind and body, and some helpful ones for the spouses. Try to share with him. I tried to join a Lyme group, hoping that some of the spouses would be able to support each other as well, but no one comes to my area meet-up. So he's pretty alone. He has my sympathy - sometimes I feel like the failure of the relationship and worship the ground he walks on for putting up with me. And other times I scream his ear off, and have spent my fair share of days (and weeks) crying for no reason.
Lyme is brutal to marriage. I try to make the most of the good days to encourage BOTH of us to work through the bad ones.