Student or Learner
In this song I need act out melancholy feelings of a romantic love than begins in spring and ends in the first days of October.
The song plays with the springtime(Begining of love, sunny days, windy days) and the passing of the months with the change weather(End of love, rainy days, windless days.)
October days, no wind today.
a spring day, rainy and windy.
That's when you whispered in my ear, and...
happened that the air fell in love with the wind.
If it were me, I would remove "happened that" and simply leave "and ... the air fell in love with the wind" (an idea that I really like!)
Note my other corrections to your post, marked in red.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.