Weight? Am I the only one?

So I’m 5’4 and 112. Pretty skinny and petite. So, I just want to know if at times, do people just randomly comment on your weight saying “oh, you really need to eat more” or “oh, your so skinny, do you eat?” There are tons of girls smaller and skinnier than me, so at times I just feel like I’m literally anorexic. I eat ALOT! So, I do eat but I just burn it all of naturally. My coworkers comment on my weight all the time, and so do random people in public. I may be standing in a line and somebody may say something. It’s really hurtful, because I am in fact tying to gain weight but it is hard. Family, strangers, coworkers, everybody I can think of comments on me. I’m doing everything I possibly can while trying to stay healthy. I get so mad, that I literally be seconds away from cursing people out. Would I be wrong? Or should I just hold it in? I know the whole “show respect” thing, but I think people need to stop putting their opinions in places it don’t belong. People don’t know if I struggle or not. Please tell me I’m not the only one. These are all of me currently: