I hate gross fatty foods that roll around in grease

Anything with preservatives or additives is disgusting to me. Last time I saw my mom she got pissed off at me cuz I refused to eat that crap, and it's like why are you annoyed at me for not wanting to eat unhealthy food. For the past 3 months I've only been eating salads, fruits and cuts of meat. My belly has started to go flat as I feel like I'm lighter, faster and more energetic