Hey Jane -
A few thoughts on where you could go with the lyrics -
I think a verse where you almost plead with them, telling them why you want it so bad.
Another verse, where you fantasise about what it would have been like if they said YES!
A bridge where you resign yourself to their answer
and then a verse where you vow to prove them wrong/ or a repeat of the chorus where it goes like this
tell me something not just no
give me a reason not just no
it’s too bad not just no
tell me something, tell me yes..
and end.
I realise I haven't done the hard part of coming up with the lyrics, but some ideas for you to consider in terms of structuring the song.
I like the concept - I have just written a song along a similiar theme
Good luck!!