SOLVED. YA SFF Romance, Girl and Boy from parallel universes fall in love. [s]

[Starr]

I can't remember the title of a book I read a few years back. The main character was a girl who had been visited by an old woman throughout her life, with the woman always appearing different ages but always very familiar, who told her folk stories.
She meets this guy and they realize they're from alternate versions of the same place and they fall for each other and I remember the guy's best friend was someone who died in the MC's reality.

[Leah]

The Love That Split the World?

[Starr]

Yes! Thank you!