I'm assuming this is a joke.
Let's hope it's a wind up.
Fuck me!
For all the dullards on here, IT'S A WIND UP!
And to help you in the future, this is how you recognise that this is all clearly, categorically, obviously a wind up (Not a kind of "I say, I say, I say" joke, but a dry commentary on the OP's actual aversion to having her rice and curry served together.)
Fuming.
This sets up an emotional tone of fury.
BF (few months relationship) invited me over to his for a meal, home made thai curry, so far so good. He plated it up in the kitchen and brought the food to me with all of the curry and sauce on top of the rice,
From fury to mundanity. Bathos. A comic device.
when I like to have them side by side and have some clean rice as a palate cleanser.
Deliberately unusual language conventions. Rice is not normally described as clean. Or as a palate cleanser. "Clean rice as a palate cleanser" is a comedic concept.
Its just good manners and basic rice etiquette to ask first.
Rice etiquette. That's already not a thing, right? Another comic invention. Basic rice etiquette is doubly not a thing. Gradations of rice etiquette is an obvious comic concept.
I cannot believe I was dating such a neanderthal. He even tried to gas light me, saying that it doesn't make any difference and basically trying to invalidate my feelings and lived experience.
Finally, the fury comes to the surface. This is an obviously exaggerated response to a rice slight. Clues: gas light and lived experience contrasting with basic rice etiquette. Hyperbole.
Eugh, men
It's not exactly Wildean wit, but it's a perfectly readable light for anyone with half a brain.
I honestly wonder how some of you manage to go through your day to day lives.
Neuro-diversity nothwithstanding, of course, etc etc etc.
(Rice slight* is my own linguistic conceit. It's not a joke, it's just a colourful turn of phrase. No-one can be slighted by rice. And it rhymes. Playful.)