Teen relationship

Hi, I met a guy for the first time yesterday, we where in his car and like doing stuff...I’ve always struggled with the way I look but as yall no when yous sit ur stomach folds over...I wouldn’t say I’m big for 16...I’m between a size 10-12 in clothes and...but ever since yesterday I’ve being feeling so insecure about my body and he hasn’t messaged me since meeting, so he prolly saw my stomach and just me in general and thought “na”. What do I do?