My sonnet (Begginer I aint even really sure I know what a sonnet is so please comment)

Briefly, I saw your smile in a crowd
The glance we shared will last until the end
But then my hopeful smile turned to a frown
I don't know if I'll see your face again.

I am forlorn and know not what to do
Because, in life, I'll never be with you.

Incase your wondering that sounds sort of like a song well your right its a sonnet about the song ' Your'e Beautiful ' by James Blunt.