I have to attempt it, I have low self-esteem

I barely look at myself, I walk pass the mirror everyday and not look at my reflection. I get called beautiful and pretty but I think to myself I'm so unattractive and fat. I tired to dress nice but my face and my body doesn't match. I hide behind sweatpants and hoodies. I don't take pictures because I don't feel beautiful. I create this image in my head of this person I'm not, then I look in the mirror and remind myself I'm not her.