Thick girl versus hunky muscular guy? ? ? ? ?

Met a gorgeous new guy , tall muscular abs...but I'm nervous around him cuz I'm am a thick girl. We went on one date and he has been planning more for future events, however, part of me yearns to call it off cuz of my weight. I feel like he sees the flaws and feel I don't quite measure up. Is there any advice to be given so I may feel comfortable in future settings with this person? Any flattering clothing advice for gurls with curves and hips? Adult advice greatly appreciated