Always feeling full/bloated

Okay… so like i never feel hungry ever. But when i do eat (because i suppose i should) no matter the size or what it is 80% of the time i feel REALLY bloated and kinda nauseous. Which is why i only have some granola bars, yogurt, small snacks, and fruit. Which is okay cause thats just my diet normally and im okay with eating that. But still even then it can make me feel like that and sometimes i want to eat other things yknow? But i dont cause i worry after of how ill feel. Idk it just really sucks and wish i knew why. Anybody else have a similar problem or know what it could be?