I would take t up on talking to H, you say he says he will do what it takes, give him the opportunity.
And, I am sorry if this is annoying, but his anger will not be helpful for you and if he cannot listen, really cannot, that is his issue and you need to find that kind of support elsewhere. As for repetition (lots of good thoughts in previous threads) we all do it and often we do it more when we don't feel heard or have anxiety----
When my mom had dementia, the repetition was constant, and not easy even knowing it was the disease, not her----my son was really the best at simply answering the same questions over and over just as if they were being asked for the first time; it saves a ton of bad feelings all around; even as a nurse, dealing with this in family, in home, is quite different----and I would sometimes lose perspective.
It sounds like you need to build some new friendships. Is there any hobby/interest you have that you could share in a group (craft, reading group, a class, yoga, gardening, other?----check out community education opportunities/talks, tours....)---this way you can have interactions around an activity, and as you get to know someone, it may help to just let them know that you might be repetitive at times and it's ok for them to let you know when it happens. We all have something we do that we don't like. When anxious or down, I know I tend to self-reference when someone is talking about someone else or themselves, I hate hearing it come out of my mouth; but it happens. My kids know I am aware of this, which takes the edge off for them when it happens, they know they can just let it roll away, and that it won't last as I work on it....
Sometimes, I think it comes from having a job that requires me to be attentive always others, both patients and coworkers. (sounds logical but I doubt it is really)