Hi, Amelie,
Throwing in my 2 cents worth here. You have some excellent input from experienced, knowledgeable people.
I believe your system, like mine, cannot tolerate alcohol. Instant idiot, just add alcohol. And that means even one!
If you tell your SO flat out you're allergic to it or cannot systemically handle it or just plain don't want it and he doesn't support you in that, he is not behaving in a loving way. Maybe he needs more education. But this is so important to your well-being now and for the rest of your life, you can't let him stand in your way.
I'll hesh now.