I also remember what it was like to be 15 years old and I think girls more than boys feel so embarrassed when they are asked out, I know I did! There is a lot of peer pressure on young people now, 'is he fit?', 'does he look good?' etc. I'm not saying she is like this but she probably feels a bit conscious about it, but by just being your friend for now feels better. I agree with In a Pickle, you sound a lovely young guy, pity you're just a bit too young for my daughter! lol x