There's a term for this, it's called fatorexia, believing you're thinner than you really are. I went through this exact thing for ages, not bothering to lose weight because I thought I wasn't that fat, but dressing room mirrors are not kind and that's where I first realised I needed to lose weight. But don't get discouraged, keep up with your weight loss plan and in time you'll look great in the clothes you want to wear.
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