Eating........ problems...........?

ok im scared to eat in front of people. im kind of a picky eater like ill eat a lot of good things but im scared that ill eat to much of something and people will think im rude or bad. i dont no wat to do. like im fine going over to my bffaeaeaes and stuff but to houses i dont no really well i get kind of freaked out....like im going over to my friend *JILL* and im probs gunna stay for dinner and im just scared that im going to eat to much or if i restrain myself it to little and theyll think i didnt like wat they made or something. Also i have issues eating snacks like i dont want to seem piggy and eat a snack i feel like people will think im just a girl who eats a lot! so please help me get over this awkward embarrment of well...eating