No one died because they didn't get to eat a cookie, first of all.
So the idea that others are "suffering" is kinda silly...
Second of all, you may have to provide store-bought cookies for awhile. That way you don't have to go through the terrible temptation of baking them! And, you can buy small packs.
It's true that you can't expect others in your household to go on a diet with you--but at the same time, if they would like to support you in your weight loss, they may be able to agree to some modifications, like store-bought cookies, or less at dessert time, and so on. Yes, you need to control what you eat, but there's no need to make life torture.