I neeeeed help please?

Hi there,I'm 16 years old and there's this guy i really like. I'm very selfconcious and afraid of rejection. He's quite smaller than i am andfeel embaressed by my size. He's also older but idk how much older he is. Should i try or what should i do? I've also never had a boyfriend,been kissed or had sex. He's a foreign guy tooo. Please help me out.