Mood swings in husband

My husband for the past year has had some major mood swings and refused to get checked out. He finally went to the doctor and got diagnosed with diabetes. Does diabetes affect one’s mood a lot? I’ve not been around people that have diabetes but my mom who is full time caring for my grandma says yes. But like my husbands low points are causing fights and he tells me things like “I don’t care about your day when you don’t care about mine” after I asked him how his day was but he never asks about mine. Or like the one time I tell him no I don’t want to be intimate in the bedroom he has a full blown meltdown about it and goes on and on about how I always say no and that our marriage is turning into a business transaction because he makes more. He has recently started communicating when he feels like he may snap and will let me know if he’s feeling short tempered and I’ll give him his space. I’m just getting to a point where this is really affecting me mentally and he doesn’t seem to care. I try communicating how I feel and it just turns into a fight about how I make him feel when I try to be so considerate.