I ate my fiance's crackers
Why did you eat her crackers?
I was looking for something edible.
It is understandable being really hungry but you shouldn't eat other people's food. They will be upset with you.
I feel bad about it. I'm going to buy her lots of food as compensation.
I am glad that you understand it was wrong to eat her food and that you are trying to make up for it. It is nice of you and she will appreciate it.