HI!
you are supposed to be nervous,you are a human being,but think about the fact that he might be as nervous as you are.He saw your pics,heard your voice and wanted to meet you,just as you did.Just be yourself and you'll win him,and even if nothing romantic comes out of it,you are already friends.Remember,you have as many chances to find a flaw in him as he has.So,go for it!enjoy the date!
in regards to being fat I can say only one thing,when I was skinny,no man would look at me,if anyone did-only with pity , as soon as I regained my normal wt I noticed the difference in the way they looked at me.My husband said once,woman supposed to be soft,not bony,of course there is a taste difference,but in general I wound that to be true.Love yourself,cherish yourself and people will see you and love what you love
good luck and all the best