Sounds like your significant other is in denial...possibly a bit resentful, too, now that he's lost his drinking partner. It's not important that he understand or accept...as long as you do. Remember, you're the one who has the Serenity Prayer committed to memory, as well as the 12 and 12 of AA. You admitted your powerlessness over alcohol...and, until/if he reaches that point, too, don't expect him to understand.