My high functioning alcoholic husband got worse and worse over the years. When he died, he had been fired from three jobs in six years. Not telling you what to do, just relating my experience with a [formerly] high functioning alcoholic.
Late AH wasn't abusive per se, but had a remarkable ability to pick fights over anything. If I agreed with him, he'd change sides. At the end, I didn't speak unless spoken to, and limited my response to "Mmmm-hmm."