No self confidence😭😭

Why do some say I’m fat and others don’t? When posting on social media I always try to make my self look thinner; by tucking my top into my trousers to make it look like I have a figure when in actual fact I don’t! I’m not sure if I’ll ever be able to get naked in front of a boy.

Like this ^^^^

I don’t have a lot of confidence as it is, I’ve always tried losing weight and it never works for me.

I sometimes wear jackets that flare at my wait to make it seem as I am smaller on the inside.

This picture is of me on my 18th birthday I feel horrible by this picture and trying to loose weight.

How can I loose weight? How can I feel confident in myself?