Horrible day

Today I was in calculus and I sit next to this boy let's call him jack. Jack and I are bantering back-and-forth. I say "you're annoying" then he says it back then I say it. And then he says you're fat . He knows how this affects me I've told him I'm in grade 12 I was previously 190 pounds now I'm 152 pounds I'm 5"4 and I haven't had any one call me fat since when I was 190. I went home cried broke my diet ate a strawberry waffle and a chocolate bar and a burrito. And sobbed. Now I feel like a piece of shit:/