Back to step 1 thinking might help? You didn't cause it, can't control it, and can't cure it.
Ergo--If simply talking about wine pairing with food is going to send him on a relapse, he'd find his way back there regardless, there would be something else that set him off.
How does worrying help? I have had to ask myself that many times. My answer was always--it didn't.
I would focus on how you are not enjoying your time with him right now. Expand upon that and share with us about that if you want to, or just ask yourself that question and brainstorm for answers?
I'm looking for ways to help you...not ways to worry about him.