Scared I’ll disappoint

I need you girls’ advice. So I’m meeting up with this guy in 2 days that messaged me on Facebook and I’ve never met him but we have mutual friends (he’s a real person ahaha) anyways he’s only seen my profile picture and doesn’t know what anything other than my face looks like. In the past the girls he’s dated we literal models, like really fricken stunning. I’m so anxious he’ll be disappointed by my appearance in real life. So anxious that I may not actually show up. I’m not overweight (maybe according to BMI or whatever) but most people would probably consider me slim-average. I can’t help compare myself to his exes. How do I react if he rejects me as soon as he sees me? Heeellppp! Xoxo