I'm going to lie to my boyfriend about food.
Why do you want to lie to your boyfriend about food?
I do have reasons for doing this and I think he will be happier.
It's no good to lie to your partner. You should talk to your partner honestly about food.
He's going to be mad at me because I think he's going to reject this idea.
You should let them know the truth about the food, telling them the truth will keep you honest and trustworthy. Your boyfriend won't know when to fully trust you in the future.