Really annoyed with people touching/ staring at my belly?

I'm only 14 weeks but its starting to show. My boyfriends family is always trying to see my belly or touch it. It REALLy gets me so angry, I have no idea why but I just find it annoying. I don't feel pregnant I feel like I'm just gaining weight and I just don't like to be stared at. Any advise? Am I the only one with this problem? I don't want to be rude but I just can't take it anymore.