@lueverson I'm sorry that you're experiencing those behaviors. My husband has MCI as well. It's so difficult to maneuver through this with them when they are in denial and convinced that there is nothing wrong, and sometimes we can even go along with pretending because they do have great time spans that seem normal, until they don't, again. We see these new behaviors that we have never seen from them, then they turn around and ask what do you see that makes you think I have dementia and we can't list them, because it would be for no good reason, it would just upset them, plus they would, again, deny, deny, deny.
So, there is no solid answer, unfortunately, for any of us. But at least we have each other to lean on for solace.
I do hope you seek help for your anxiety and sadness over his changes. You are important.