Hi Miss A,
Well,
First thing - go for it and enjoy it.
Second thing - If this guy says that he likes you, and likes things about you (he said that you're not fat, for instance) - believe him!
You have a lifetime to worry about thinking negatively, and this is definitely not the time to start. You are attractive Miss A, and maybe it's time you faced up to it!
Cheers, M
PS - Don't we just like hearing good news on Psych Central.