I asked him to hangout :(

We are so flirty at work and it's just a great day for me if I see or talk to him. I'm plus size and I'm worried his ' popular ego' wouldn't want me. He's buff and skinny and I'm definitely not. But I feel like he does like me. So I asked him ' hey if your ever not working we should hangout I reckon it would be fun 😂😂' 
I'm really scared of his response as I'm never asked a guy to hangout before.  What if he doesn't want to be seen with a fat chick? ☹️
Update - he read it an hour ago and no reply.