The snow girl by Sophie Anderson

I wish the snow girl would come to life. Then I would have a friend, a real friend I could trust, and I wouldn’t feel so alone. When Tasha builds a snow girl with her grandpa, all she wants is for her to be real. If only wishes on snow could come true. Then Tasha meets Alyana, a friend made of wishes, starlight, snowfall and magic. But when your best friend is made of winter, what do you do when spring comes?