Help! I can't remember the name of this book...

[Rosy]

She lives on a small ranch in Billings, Montana and is in love with her neighbor who lives on a big ranch , but he is in love with her sister at the time.
She leaves home because her family doesn’t love her very much, she also had an encounter with her neighbor who practically humiliated her.
So she’s going to New York to get a job as a photographer.

After a while she becomes the editor-in-chief of a prestigious magazine. Her best friend is a homosexual tailor. She’s considered a cold woman

Then her family calls her for her sister’s engagement party with
a surgeon and meets again with his love of youth and also the
owner of the ranch where his magazine wants to do a photo session