Sensei said something that makes me want to quit?

Alright, so after karate class a few days ago, my sensei told me I am not good for it anymore because i'm a girl and I can't seem to do the moves ''right''.. now i feel bad about my self because now I feel like I have to give up everything I learned because I feel insecure about being a girl and learning martial arts.. Would it be right to give it all up?