So, he is accusing you of so many issues and hopes one sticks enough for a breakup.
It often comes from a place of regret or fear of being hurt.
However, over sensitivity can pose a problem and is a common reason a partner could be suspicious of another.
If you're guilty, you should come clean about it if you want to save what's left of the relationship.
But blame can also be a defensive thing.
This will allow you to find the root cause of the narcissist behavior of your husband and work towards improving your bond.