Who is she?

Yesterday as the sun went down
Only one thing was in my crown;
Under the glow of the darkening cloud
In my heart a thought cried aloud:
Summer is going, with all its host,
Surrendering to autumn and winter’s frost
Hope fled away, gone without reason
Early, to feel the loss of the season.
Then, another came into view,
Ready and willing her life to renew,
Under the glow of the pinkening cloud
Even she who is you, of whom be proud.