I don't want to eat a gross dinner that my girlfriend worked hard on
What do you mean by gross and what kind of food are we talking about?
Her vagina
It's understandable to not go down on your girl. Ask her to do 69, so you can both have fun at the same time.
It's still feels like her vagina is somewhere else and the hole is open.
If you are uncomfortable with going down on a woman you can tell her that. If you are scared you could try to learn about techniques or go slow and be receptive to her directions.