Do you find it weird

When some says you look beautiful? Someone who's not a family or a friend. But like you think seriously? You think I'm beautiful? Are you looking at the same person? I guess when someone says it to me I don't necessarily believe them altho I'm flattered and thank them for the compliment. Guess from years of bullying being told I was fat and ugly at school just made me believe I was. Isn't it weird, we believe the stuff that is criticising us more than the stuff that compliments us