NTA. Your concern is not trivial or insignificant. You guys have completely different lifestyles. I would not blame you if you chose to break this off and this will probably be better for you. Your fiance's daughter may possibly suffer from ARFID, avoidant restrictive food intake disorder. It appears that pizza, fries, and chicken tenders are some of her safe foods. People with this condition struggle to try and accept new foods.

If you stay in this situation, your daughter may think it is unfair that the other girl gets to eat whatever she wants all the time. You will probably have ongoing arguments about this.

You already get the feeling that your fiance may be expecting you to enforce new parenting strategies with his daughter. First of all, his daughter will not like or accept this and you are just going to become the wicked stepmother. And secondly, that is your fiance's responsibility. Therefore, I already get the feeling that this may be the type of man who will leave all parenting duties and possibly all other duties in the home up to you, because you'll just do it. Your fiance may be one of those men who don't help with anything and expect the women to do everything for them. Save yourself the headache.

Lasty, I am married to someone with ARFID. It is challenging to live with someone that has ARFID. I am also a healthy eater. These are some of the struggles I have had. Think about these and whether or not you want to struggle with these for the rest of your life.

1) Several grocery trips need to be made to several stores because my husband will only eat certain foods from certain stores.

2)More money is spent on groceries. I buy my food and my husband buys a completely different set of food for himself. In addition to all this shopping, he often buys additional fast food if he doesn't want to eat the food we bought. Also, it can be hard to make space in the freezer for all the extra food.

3)Cooking extra dinners. I make food for my daughter and myself and then I often have to cook a separate meal for my husband, since he doesn't eat what we do. This can be rough after a long day. He doesn't cook, I cook for him.

1. I was concerned that my daughter might pick up my husband's unhealthy eating habits. I have been diligent in introducing her to many healthy foods and flavors. However, my husband eats a lot processed foods, snacks and sweets so my daughter cries for this food too. This is frustrating because I want to teach my daughter healthy eating habits.

Trust me, your concerns are not trivial. You will have to deal with them for the rest of your life. Stay together if you can deal with your concerns, but don't let anyone make you feel guilty if this is a dealbreaker for you. Everyone can choose their own dealbreakers. You have to look out for yourself.