Why do I feel so scared to eat in front of my friends and feel the need to brag about how little I am eating?

you dont need to brag about how you eat.. just be your self and dont pay mind to those people who talk about you.. but dont also to not exaggerate how you eat

Control, this is the last thing in your life you feel you can control. Other people always seem so cool, I hate my life/self. I can't do anything right, people watch me, I need to get something/anting right. To show that I am worthy/beautiful/self controlled/powerful.

It may be your way of convincing yourself or others, or a way to put forward a sort of reputation or image.

It is common to feel like we have to impress others. Especially when we are in a group.How do you feel when you eat alone?

Because the media of the world has made you think deep down that you are not thin enough and you seek acceptance fomr the people around you so you feel the need to tell them you are not eating so your working on being thin.

Maybe it's the social pressure we have to always have to be perfect. Nowadays, eating is associated with gaining weight, and gaining weight is not considered to be a good thing. I think it's a misconception that we all need to change it.