Do you think this will put him off me?

I like this guy and apparently he likes me too, and he likes girls with big hips and curves and I am really uncomfortable with my weight because i feel so fat. I am 9st12, about a size 10 and 5"3, and I want to lose abut a stone in weight for the next time i see him, but if he likes chunky girls and i lose some weight, do you think he will not like me anymore? thanks!:)