People are more complex than "time for an anxiety pill" IMHO. Knowledge is often better than chemicals. It sounds like he doesn't want to read end of life stories here, but you can, and pass on the basics to the effect that he doesn't need to suffer.
Above all, the end of his life (that's when you stop measuring/counting food/liquids/drugs) is when he says it is; that is what I would reinforce since people read horror stories and don't perceive their rights as patients, whatever equipment they did or did not accept. It is more likely that he will experience air hunger that signals life's natural end before he actually chokes to death, and appetite loss kind of goes with that.
If he has difficulty with solid food and is losing weight, maybe time to jump-start some super-calorie/nutrient-packed smoothies, soups, whatever his best thickness/texture is. Eggs, protein powders, even peanut butter can be staple ingredients. Do a search here for some ideas. As others point out frequently, blenderizing "real food" can create a fairly easy-to-eat option, different every day.
Best,
Laurie