Good Morning!
I had to respond to this immediately, because my boyfriend has the same exact problem!
What has worked for us:
Giving him 6 meals- smaller portions seem less overwhelming
Play relaxing music to create a comfortable environment
Stick to dishes that they truly love on the days that they loose appetite
Make the food anyways when they refuse, just give them a small portion and encourage them slowly to eat
Juice 3'xs a day- Kale/Spinach/Dandelions/Cucumber/Lemon/ Green Apples
Taking cannibis to increase appetite
Create an easy eating schedule and stick with it
Making a variety of puree soups so that it's easier to eat without choking
http://ohsheglows.com/2013/09/25/luxurious-7-vegetable-and-cheese-soup/
Zofran has really helped my boyfriend with the nausea feel better
I have made that a couple of times, it was easy and delicious.
I really hope this helps you. You're not alone in this! You will figure it out.
Best,
Hope