i feel so bad

this maybe isn't the right place for this but i just wanted to share this with a female base. so, today i was with some people, I wouldn't call them friends but they're a little more than acquaintances, we were joking around and making jokes about each other, nothing personal, just fun. until one guy who i feel doesn't really like me turns around and compares me to a cow.. i know i shouldn't let this mess me up but over the last few months I've eaten less and less where im at the point of barely eating now, im dropping weight and it just makes me feel so bad like i wanna hide away. how can I stop feeling so low over a stupid joke?