why is it everytime l tr to be nice it get thrown in my face again

ok lm sick of everyone putting me down, saying lm fat and ugly lm not saying l am gorguz or skinny l consider myself just me, and wat is with my dad always pushing me around l cant take this anymore, my friends say l am so nice but when it comes to other ppl they love me getting put down, l get teased for being bi sexual for my mothers death